diff --git a/dll/win32/msi/CMakeLists.txt b/dll/win32/msi/CMakeLists.txt
index ec30aa8913c..2acc74d7337 100644
--- a/dll/win32/msi/CMakeLists.txt
+++ b/dll/win32/msi/CMakeLists.txt
@@ -1,5 +1,5 @@
 
-remove_definitions(-D_WIN32_WINNT=0x502)
+remove_definitions(-D_WIN32_WINNT=0x502 -D_CRT_NON_CONFORMING_SWPRINTFS)
 add_definitions(-D_WIN32_WINNT=0x600)
 
 include_directories(${REACTOS_SOURCE_DIR}/sdk/include/reactos/wine)
@@ -84,7 +84,7 @@ add_idl_headers(msi_idlheader msiserver.idl winemsi.idl)
 add_typelib(msiserver.idl winemsi.idl)
 set_source_files_properties(msi.rc PROPERTIES OBJECT_DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/msiserver.tlb;${CMAKE_CURRENT_BINARY_DIR}/winemsi.tlb")
 set_module_type(msi win32dll)
-target_link_libraries(msi uuid ${PSEH_LIB} wine)
+target_link_libraries(msi uuid ${PSEH_LIB} wine oldnames)
 add_dependencies(msi msi_idlheader)
 add_delay_importlibs(msi odbccp32 crypt32 wintrust)
 add_importlibs(msi advapi32 advapi32_vista cabinet comctl32 gdi32 ole32 oleaut32 shell32 shlwapi rpcrt4 urlmon user32 version wininet sxs
diff --git a/dll/win32/msi/action.c b/dll/win32/msi/action.c
index 07f3778d1ce..29ccf68c539 100644
--- a/dll/win32/msi/action.c
+++ b/dll/win32/msi/action.c
@@ -36,7 +36,6 @@
 #include "mscoree.h"
 #include "shlwapi.h"
 #include "imagehlp.h"
-#include "wine/unicode.h"
 #include "winver.h"
 
 #include "msipriv.h"
@@ -317,9 +316,9 @@ done:
 static void remove_quotes( WCHAR *str )
 {
     WCHAR *p = str;
-    int len = strlenW( str );
+    int len = lstrlenW( str );
 
-    while ((p = strchrW( p, '"' )))
+    while ((p = wcschr( p, '"' )))
     {
         memmove( p, p + 1, (len - (p - str)) * sizeof(WCHAR) );
         p++;
@@ -344,7 +343,7 @@ UINT msi_parse_command_line( MSIPACKAGE *package, LPCWSTR szCommandLine,
         while (*ptr == ' ') ptr++;
         if (!*ptr) break;
 
-        ptr2 = strchrW( ptr, '=' );
+        ptr2 = wcschr( ptr, '=' );
         if (!ptr2) return ERROR_INVALID_COMMAND_LINE;
 
         len = ptr2 - ptr;
@@ -355,13 +354,13 @@ UINT msi_parse_command_line( MSIPACKAGE *package, LPCWSTR szCommandLine,
         prop = msi_alloc( (len + 1) * sizeof(WCHAR) );
         memcpy( prop, ptr, len * sizeof(WCHAR) );
         prop[len] = 0;
-        if (!preserve_case) struprW( prop );
+        if (!preserve_case) wcsupr( prop );
 
         ptr2++;
         while (*ptr2 == ' ') ptr2++;
 
         num_quotes = 0;
-        val = msi_alloc( (strlenW( ptr2 ) + 1) * sizeof(WCHAR) );
+        val = msi_alloc( (lstrlenW( ptr2 ) + 1) * sizeof(WCHAR) );
         len = parse_prop( ptr2, val, &num_quotes );
         if (num_quotes % 2)
         {
@@ -374,7 +373,7 @@ UINT msi_parse_command_line( MSIPACKAGE *package, LPCWSTR szCommandLine,
         TRACE("Found commandline property %s = %s\n", debugstr_w(prop), debugstr_w(val));
 
         r = msi_set_property( package->db, prop, val, -1 );
-        if (r == ERROR_SUCCESS && !strcmpW( prop, szSourceDir ))
+        if (r == ERROR_SUCCESS && !wcscmp( prop, szSourceDir ))
             msi_reset_source_folders( package );
 
         msi_free( val );
@@ -388,7 +387,7 @@ UINT msi_parse_command_line( MSIPACKAGE *package, LPCWSTR szCommandLine,
 
 const WCHAR *msi_get_command_line_option(const WCHAR *cmd, const WCHAR *option, UINT *len)
 {
-    DWORD opt_len = strlenW(option);
+    DWORD opt_len = lstrlenW(option);
 
     if (!cmd)
         return NULL;
@@ -400,10 +399,10 @@ const WCHAR *msi_get_command_line_option(const WCHAR *cmd, const WCHAR *option,
         while (*cmd == ' ') cmd++;
         if (!*cmd) break;
 
-        if(!strncmpiW(cmd, option, opt_len))
+        if(!wcsnicmp(cmd, option, opt_len))
             found = TRUE;
 
-        cmd = strchrW( cmd, '=' );
+        cmd = wcschr( cmd, '=' );
         if(!cmd) break;
         cmd++;
         while (*cmd == ' ') cmd++;
@@ -429,7 +428,7 @@ WCHAR **msi_split_string( const WCHAR *str, WCHAR sep )
     /* count the number of substrings */
     for ( pc = str, count = 0; pc; count++ )
     {
-        pc = strchrW( pc, sep );
+        pc = wcschr( pc, sep );
         if (pc)
             pc++;
     }
@@ -445,7 +444,7 @@ WCHAR **msi_split_string( const WCHAR *str, WCHAR sep )
     lstrcpyW( p, str );
     for( count = 0; (ret[count] = p); count++ )
     {
-        p = strchrW( p, sep );
+        p = wcschr( p, sep );
         if (p)
             *p++ = 0;
     }
@@ -478,7 +477,7 @@ UINT msi_set_sourcedir_props(MSIPACKAGE *package, BOOL replace)
     if (!(db = msi_dup_property( package->db, szOriginalDatabase )))
         return ERROR_OUTOFMEMORY;
 
-    if (!(p = strrchrW( db, '\\' )) && !(p = strrchrW( db, '/' )))
+    if (!(p = wcsrchr( db, '\\' )) && !(p = wcsrchr( db, '/' )))
     {
         msi_free(db);
         return ERROR_SUCCESS;
@@ -687,7 +686,7 @@ MSICOMPONENT *msi_get_loaded_component( MSIPACKAGE *package, const WCHAR *Compon
 
     LIST_FOR_EACH_ENTRY( comp, &package->components, MSICOMPONENT, entry )
     {
-        if (!strcmpW( Component, comp->Component )) return comp;
+        if (!wcscmp( Component, comp->Component )) return comp;
     }
     return NULL;
 }
@@ -698,7 +697,7 @@ MSIFEATURE *msi_get_loaded_feature(MSIPACKAGE* package, const WCHAR *Feature )
 
     LIST_FOR_EACH_ENTRY( feature, &package->features, MSIFEATURE, entry )
     {
-        if (!strcmpW( Feature, feature->Feature )) return feature;
+        if (!wcscmp( Feature, feature->Feature )) return feature;
     }
     return NULL;
 }
@@ -709,7 +708,7 @@ MSIFILE *msi_get_loaded_file( MSIPACKAGE *package, const WCHAR *key )
 
     LIST_FOR_EACH_ENTRY( file, &package->files, MSIFILE, entry )
     {
-        if (!strcmpW( key, file->File )) return file;
+        if (!wcscmp( key, file->File )) return file;
     }
     return NULL;
 }
@@ -720,7 +719,7 @@ MSIFOLDER *msi_get_loaded_folder( MSIPACKAGE *package, const WCHAR *dir )
 
     LIST_FOR_EACH_ENTRY( folder, &package->folders, MSIFOLDER, entry )
     {
-        if (!strcmpW( dir, folder->Directory )) return folder;
+        if (!wcscmp( dir, folder->Directory )) return folder;
     }
     return NULL;
 }
@@ -1124,7 +1123,7 @@ static LPWSTR folder_split_path(LPWSTR p, WCHAR ch)
 {
     if (!p)
         return p;
-    p = strchrW(p, ch);
+    p = wcschr(p, ch);
     if (!p)
         return p;
     *p = 0;
@@ -1436,9 +1435,9 @@ static UINT load_folder( MSIRECORD *row, LPVOID param )
     src_long = folder_split_path( src_short, '|' );
 
     /* check for no-op dirs */
-    if (tgt_short && !strcmpW( szDot, tgt_short ))
+    if (tgt_short && !wcscmp( szDot, tgt_short ))
         tgt_short = szEmpty;
-    if (src_short && !strcmpW( szDot, src_short ))
+    if (src_short && !wcscmp( szDot, src_short ))
         src_short = szEmpty;
 
     if (!tgt_long)
@@ -1655,8 +1654,8 @@ static BOOL process_state_property(MSIPACKAGE* package, int level,
 {
     LPWSTR override;
     MSIFEATURE *feature;
-    BOOL remove = !strcmpW(property, szRemove);
-    BOOL reinstall = !strcmpW(property, szReinstall);
+    BOOL remove = !wcscmp(property, szRemove);
+    BOOL reinstall = !wcscmp(property, szReinstall);
 
     override = msi_dup_property( package->db, property );
     if (!override)
@@ -1672,7 +1671,7 @@ static BOOL process_state_property(MSIPACKAGE* package, int level,
         else if (remove)
             state = (feature->Installed == INSTALLSTATE_ABSENT ? INSTALLSTATE_UNKNOWN : INSTALLSTATE_ABSENT);
 
-        if (!strcmpiW( override, szAll ))
+        if (!wcsicmp( override, szAll ))
         {
             feature->Action = state;
             feature->ActionRequest = state;
@@ -1680,14 +1679,14 @@ static BOOL process_state_property(MSIPACKAGE* package, int level,
         else
         {
             LPWSTR ptr = override;
-            LPWSTR ptr2 = strchrW(override,',');
+            LPWSTR ptr2 = wcschr(override,',');
 
             while (ptr)
             {
                 int len = ptr2 - ptr;
 
-                if ((ptr2 && strlenW(feature->Feature) == len && !strncmpW(ptr, feature->Feature, len))
-                    || (!ptr2 && !strcmpW(ptr, feature->Feature)))
+                if ((ptr2 && lstrlenW(feature->Feature) == len && !wcsncmp(ptr, feature->Feature, len))
+                    || (!ptr2 && !wcscmp(ptr, feature->Feature)))
                 {
                     feature->Action = state;
                     feature->ActionRequest = state;
@@ -1696,7 +1695,7 @@ static BOOL process_state_property(MSIPACKAGE* package, int level,
                 if (ptr2)
                 {
                     ptr=ptr2+1;
-                    ptr2 = strchrW(ptr,',');
+                    ptr2 = wcschr(ptr,',');
                 }
                 else
                     break;
@@ -2061,7 +2060,7 @@ static WCHAR *create_temp_dir( MSIDATABASE *db )
         if (!(db->tempfolder = strdupW( tmp ))) return NULL;
     }
 
-    if ((ret = msi_alloc( (strlenW( db->tempfolder ) + 20) * sizeof(WCHAR) )))
+    if ((ret = msi_alloc( (lstrlenW( db->tempfolder ) + 20) * sizeof(WCHAR) )))
     {
         for (;;)
         {
@@ -2106,7 +2105,7 @@ WCHAR *msi_build_directory_name( DWORD count, ... )
     for (i = 0; i < count; i++)
     {
         const WCHAR *str = va_arg( va, const WCHAR * );
-        if (str) sz += strlenW( str ) + 1;
+        if (str) sz += lstrlenW( str ) + 1;
     }
     va_end( va );
 
@@ -2118,8 +2117,8 @@ WCHAR *msi_build_directory_name( DWORD count, ... )
     {
         const WCHAR *str = va_arg( va, const WCHAR * );
         if (!str) continue;
-        strcatW( dir, str );
-        if ( i + 1 != count && dir[0] && dir[strlenW( dir ) - 1] != '\\') strcatW( dir, szBackSlash );
+        lstrcatW( dir, str );
+        if ( i + 1 != count && dir[0] && dir[lstrlenW( dir ) - 1] != '\\') lstrcatW( dir, szBackSlash );
     }
     va_end( va );
     return dir;
@@ -2210,7 +2209,7 @@ WCHAR *msi_normalize_path( const WCHAR *in )
 {
     const WCHAR *p = in;
     WCHAR *q, *ret;
-    int n, len = strlenW( in ) + 2;
+    int n, len = lstrlenW( in ) + 2;
 
     if (!(q = ret = msi_alloc( len * sizeof(WCHAR) ))) return NULL;
 
@@ -2276,7 +2275,7 @@ void msi_resolve_target_folder( MSIPACKAGE *package, const WCHAR *name, BOOL loa
 
     if (!(folder = msi_get_loaded_folder( package, name ))) return;
 
-    if (!strcmpW( folder->Directory, szTargetDir )) /* special resolving for target root dir */
+    if (!wcscmp( folder->Directory, szTargetDir )) /* special resolving for target root dir */
     {
         if (!(path = get_install_location( package )) &&
             (!load_prop || !(path = msi_dup_property( package->db, szTargetDir ))))
@@ -2286,7 +2285,7 @@ void msi_resolve_target_folder( MSIPACKAGE *package, const WCHAR *name, BOOL loa
     }
     else if (!load_prop || !(path = msi_dup_property( package->db, folder->Directory )))
     {
-        if (folder->Parent && strcmpW( folder->Directory, folder->Parent ))
+        if (folder->Parent && wcscmp( folder->Directory, folder->Parent ))
         {
             parent = msi_get_loaded_folder( package, folder->Parent );
             path = msi_build_directory_name( 3, parent->ResolvedTarget, folder->TargetDefault, NULL );
@@ -2409,14 +2408,14 @@ static UINT ACTION_CostFinalize(MSIPACKAGE *package)
                 primary_folder[2] = 0;
                 if (GetDiskFreeSpaceExW( primary_folder, &free, NULL, NULL ))
                 {
-                    sprintfW( buf, fmtW, free.QuadPart / 512 );
+                    swprintf( buf, ARRAY_SIZE(buf), fmtW, free.QuadPart / 512 );
                     msi_set_property( package->db, szPrimaryVolumeSpaceAvailable, buf, -1 );
                 }
                 required = get_volume_space_required( package );
-                sprintfW( buf, fmtW, required / 512 );
+                swprintf( buf, ARRAY_SIZE(buf), fmtW, required / 512 );
                 msi_set_property( package->db, szPrimaryVolumeSpaceRequired, buf, -1 );
 
-                sprintfW( buf, fmtW, (free.QuadPart - required) / 512 );
+                swprintf( buf, ARRAY_SIZE(buf), fmtW, (free.QuadPart - required) / 512 );
                 msi_set_property( package->db, szPrimaryVolumeSpaceRemaining, buf, -1 );
                 msi_set_property( package->db, szPrimaryVolumePath, primary_folder, 2 );
             }
@@ -2457,10 +2456,10 @@ static BYTE *parse_value( MSIPACKAGE *package, const WCHAR *value, DWORD len, DW
             /* binary value type */
             ptr = deformated;
             *type = REG_BINARY;
-            if (strlenW(ptr)%2)
-                *size = (strlenW(ptr)/2)+1;
+            if (lstrlenW(ptr)%2)
+                *size = (lstrlenW(ptr)/2)+1;
             else
-                *size = strlenW(ptr)/2;
+                *size = lstrlenW(ptr)/2;
 
             data = msi_alloc(*size);
 
@@ -2469,7 +2468,7 @@ static BYTE *parse_value( MSIPACKAGE *package, const WCHAR *value, DWORD len, DW
             byte[4] = 0; 
             count = 0;
             /* if uneven pad with a zero in front */
-            if (strlenW(ptr)%2)
+            if (lstrlenW(ptr)%2)
             {
                 byte[2]= '0';
                 byte[3]= *ptr;
@@ -2535,7 +2534,7 @@ static BYTE *parse_value( MSIPACKAGE *package, const WCHAR *value, DWORD len, DW
             }
         }
         data = (BYTE *)msi_strdupW( ptr, len );
-        if (len > strlenW( (const WCHAR *)data )) *type = REG_MULTI_SZ;
+        if (len > lstrlenW( (const WCHAR *)data )) *type = REG_MULTI_SZ;
         *size = (len + 1) * sizeof(WCHAR);
     }
     return data;
@@ -2601,7 +2600,7 @@ static HKEY open_key( const MSICOMPONENT *comp, HKEY root, const WCHAR *path, BO
 
     if (!(subkey = strdupW( path ))) return NULL;
     p = subkey;
-    if ((q = strchrW( p, '\\' ))) *q = 0;
+    if ((q = wcschr( p, '\\' ))) *q = 0;
     if (create)
         res = RegCreateKeyExW( root, subkey, 0, NULL, 0, access, NULL, &hkey, NULL );
     else
@@ -2637,7 +2636,7 @@ static WCHAR **split_multi_string_values( const WCHAR *str, DWORD len, DWORD *co
     if (!str) return NULL;
     while ((p - str) < len)
     {
-        p += strlenW( p ) + 1;
+        p += lstrlenW( p ) + 1;
         (*count)++;
     }
     if (!(ret = msi_alloc( *count * sizeof(WCHAR *) ))) return NULL;
@@ -2650,7 +2649,7 @@ static WCHAR **split_multi_string_values( const WCHAR *str, DWORD len, DWORD *co
             msi_free( ret );
             return NULL;
         }
-        p += strlenW( p ) + 1;
+        p += lstrlenW( p ) + 1;
         i++;
     }
     return ret;
@@ -2663,20 +2662,20 @@ static WCHAR *flatten_multi_string_values( WCHAR **left, DWORD left_count,
     unsigned int i;
 
     *size = sizeof(WCHAR);
-    for (i = 0; i < left_count; i++) *size += (strlenW( left[i] ) + 1) * sizeof(WCHAR);
-    for (i = 0; i < right_count; i++) *size += (strlenW( right[i] ) + 1) * sizeof(WCHAR);
+    for (i = 0; i < left_count; i++) *size += (lstrlenW( left[i] ) + 1) * sizeof(WCHAR);
+    for (i = 0; i < right_count; i++) *size += (lstrlenW( right[i] ) + 1) * sizeof(WCHAR);
 
     if (!(ret = p = msi_alloc( *size ))) return NULL;
 
     for (i = 0; i < left_count; i++)
     {
-        strcpyW( p, left[i] );
-        p += strlenW( p ) + 1;
+        lstrcpyW( p, left[i] );
+        p += lstrlenW( p ) + 1;
     }
     for (i = 0; i < right_count; i++)
     {
-        strcpyW( p, right[i] );
-        p += strlenW( p ) + 1;
+        lstrcpyW( p, right[i] );
+        p += lstrlenW( p ) + 1;
     }
     *p = 0;
     return ret;
@@ -2692,7 +2691,7 @@ static DWORD remove_duplicate_values( WCHAR **old, DWORD old_count,
     {
         for (j = 0; j < old_count; j++)
         {
-            if (old[j] && !strcmpW( new[i], old[j] ))
+            if (old[j] && !wcscmp( new[i], old[j] ))
             {
                 msi_free( old[j] );
                 for (k = j; k < old_count - 1; k++) { old[k] = old[k + 1]; }
@@ -2835,9 +2834,9 @@ static UINT ITERATE_WriteRegistryValues(MSIRECORD *row, LPVOID param)
         return ERROR_SUCCESS;
 
     deformat_string(package, key , &deformated);
-    uikey = msi_alloc( (strlenW(deformated) + strlenW(szRoot) + 1) * sizeof(WCHAR) );
-    strcpyW(uikey,szRoot);
-    strcatW(uikey,deformated);
+    uikey = msi_alloc( (lstrlenW(deformated) + lstrlenW(szRoot) + 1) * sizeof(WCHAR) );
+    lstrcpyW(uikey,szRoot);
+    lstrcatW(uikey,deformated);
 
     if (!(hkey = open_key( comp, root_key, deformated, TRUE, KEY_QUERY_VALUE | KEY_SET_VALUE )))
     {
@@ -2948,7 +2947,7 @@ static void delete_key( const MSICOMPONENT *comp, HKEY root, const WCHAR *path )
     if (!(subkey = strdupW( path ))) return;
     do
     {
-        if ((p = strrchrW( subkey, '\\' )))
+        if ((p = wcsrchr( subkey, '\\' )))
         {
             *p = 0;
             if (!p[1]) continue; /* trailing backslash */
@@ -3050,10 +3049,10 @@ static UINT ITERATE_RemoveRegistryValuesOnUninstall( MSIRECORD *row, LPVOID para
         return ERROR_SUCCESS;
 
     deformat_string( package, key_str, &deformated_key );
-    size = strlenW( deformated_key ) + strlenW( root_key_str ) + 1;
+    size = lstrlenW( deformated_key ) + lstrlenW( root_key_str ) + 1;
     ui_key_str = msi_alloc( size * sizeof(WCHAR) );
-    strcpyW( ui_key_str, root_key_str );
-    strcatW( ui_key_str, deformated_key );
+    lstrcpyW( ui_key_str, root_key_str );
+    lstrcatW( ui_key_str, deformated_key );
 
     deformat_string( package, name, &deformated_name );
 
@@ -3113,10 +3112,10 @@ static UINT ITERATE_RemoveRegistryValuesOnInstall( MSIRECORD *row, LPVOID param
         return ERROR_SUCCESS;
 
     deformat_string( package, key_str, &deformated_key );
-    size = strlenW( deformated_key ) + strlenW( root_key_str ) + 1;
+    size = lstrlenW( deformated_key ) + lstrlenW( root_key_str ) + 1;
     ui_key_str = msi_alloc( size * sizeof(WCHAR) );
-    strcpyW( ui_key_str, root_key_str );
-    strcatW( ui_key_str, deformated_key );
+    lstrcpyW( ui_key_str, root_key_str );
+    lstrcatW( ui_key_str, deformated_key );
 
     deformat_string( package, name, &deformated_name );
 
@@ -3292,16 +3291,16 @@ static LPWSTR resolve_keypath( MSIPACKAGE* package, MSICOMPONENT *cmp )
         deformat_string(package, key , &deformated);
         deformat_string(package, name, &deformated_name);
 
-        len = strlenW(deformated) + 6;
+        len = lstrlenW(deformated) + 6;
         if (deformated_name)
-            len+=strlenW(deformated_name);
+            len+=lstrlenW(deformated_name);
 
         buffer = msi_alloc( len *sizeof(WCHAR));
 
         if (deformated_name)
-            sprintfW(buffer,fmt2,root,deformated,deformated_name);
+            swprintf(buffer,len,fmt2,root,deformated,deformated_name);
         else
-            sprintfW(buffer,fmt,root,deformated);
+            swprintf(buffer,len,fmt,root,deformated);
 
         msi_free(deformated);
         msi_free(deformated_name);
@@ -3427,13 +3426,13 @@ static WCHAR *build_full_keypath( MSIPACKAGE *package, MSICOMPONENT *comp )
     if (comp->assembly)
     {
         static const WCHAR prefixW[] = {'<','\\',0};
-        DWORD len = strlenW( prefixW ) + strlenW( comp->assembly->display_name );
+        DWORD len = lstrlenW( prefixW ) + lstrlenW( comp->assembly->display_name );
         WCHAR *keypath = msi_alloc( (len + 1) * sizeof(WCHAR) );
 
         if (keypath)
         {
-            strcpyW( keypath, prefixW );
-            strcatW( keypath, comp->assembly->display_name );
+            lstrcpyW( keypath, prefixW );
+            lstrcatW( keypath, comp->assembly->display_name );
         }
         return keypath;
     }
@@ -3522,12 +3521,12 @@ static UINT ACTION_ProcessComponents(MSIPACKAGE *package)
                 if (!(row = MSI_QueryGetRecord(package->db, query, file->Sequence)))
                     return ERROR_FUNCTION_FAILED;
 
-                sprintfW(source, fmt, MSI_RecordGetInteger(row, 1));
-                ptr2 = strrchrW(source, '\\') + 1;
+                swprintf(source, ARRAY_SIZE(source), fmt, MSI_RecordGetInteger(row, 1));
+                ptr2 = wcsrchr(source, '\\') + 1;
                 msiobj_release(&row->hdr);
 
                 lstrcpyW(base, package->PackagePath);
-                ptr = strrchrW(base, '\\');
+                ptr = wcsrchr(base, '\\');
                 *(ptr + 1) = '\0';
 
                 sourcepath = msi_resolve_file_source(package, file);
@@ -3604,15 +3603,14 @@ static BOOL CALLBACK Typelib_EnumResNameProc( HMODULE hModule, LPCWSTR lpszType,
         return TRUE;
     }
 
-    sz = strlenW(tl_struct->source)+4;
-    sz *= sizeof(WCHAR);
+    sz = lstrlenW(tl_struct->source)+4;
 
     if ((INT_PTR)lpszName == 1)
         tl_struct->path = strdupW(tl_struct->source);
     else
     {
-        tl_struct->path = msi_alloc(sz);
-        sprintfW(tl_struct->path,fmt,tl_struct->source, lpszName);
+        tl_struct->path = msi_alloc(sz * sizeof(WCHAR));
+        swprintf(tl_struct->path,sz,fmt,tl_struct->source, lpszName);
     }
 
     TRACE("trying %s\n", debugstr_w(tl_struct->path));
@@ -3842,10 +3840,10 @@ static WCHAR *get_link_file( MSIPACKAGE *package, MSIRECORD *row )
     filename = msi_dup_record_field( row, 3 );
     msi_reduce_to_long_filename( filename );
 
-    extension = strrchrW( filename, '.' );
-    if (!extension || strcmpiW( extension, szlnk ))
+    extension = wcsrchr( filename, '.' );
+    if (!extension || wcsicmp( extension, szlnk ))
     {
-        int len = strlenW( filename );
+        int len = lstrlenW( filename );
         filename = msi_realloc( filename, len * sizeof(WCHAR) + sizeof(szlnk) );
         memcpy( filename + len, szlnk, sizeof(szlnk) );
     }
@@ -3917,7 +3915,7 @@ static UINT ITERATE_CreateShortcuts(MSIRECORD *row, LPVOID param)
     }
 
     target = MSI_RecordGetString(row, 5);
-    if (strchrW(target, '['))
+    if (wcschr(target, '['))
     {
         deformat_string( package, target, &path );
         TRACE("target path is %s\n", debugstr_w(path));
@@ -4148,7 +4146,7 @@ static UINT msi_publish_sourcelist(MSIPACKAGE *package, HKEY hkey)
 
     RegCloseKey(source);
 
-    buffer = strrchrW(package->PackagePath, '\\') + 1;
+    buffer = wcsrchr(package->PackagePath, '\\') + 1;
     r = MsiSourceListSetInfoW(package->ProductCode, NULL,
                               package->Context, MSICODE_PRODUCT,
                               INSTALLPROPERTY_PACKAGENAMEW, buffer);
@@ -4169,7 +4167,7 @@ static UINT msi_publish_sourcelist(MSIPACKAGE *package, HKEY hkey)
 
     LIST_FOR_EACH_ENTRY(info, &package->sourcelist_info, MSISOURCELISTINFO, entry)
     {
-        if (!strcmpW( info->property, INSTALLPROPERTY_LASTUSEDSOURCEW ))
+        if (!wcscmp( info->property, INSTALLPROPERTY_LASTUSEDSOURCEW ))
             msi_set_last_used_source(package->ProductCode, NULL, info->context,
                                      info->options, info->value);
         else
@@ -4235,7 +4233,7 @@ static UINT msi_publish_product_properties(MSIPACKAGE *package, HKEY hkey)
     msi_reg_set_val_str(hkey, szClients, szColon);
 
     if (!(guids = msi_get_package_code(package->db))) return ERROR_OUTOFMEMORY;
-    if ((ptr = strchrW(guids, ';'))) *ptr = 0;
+    if ((ptr = wcschr(guids, ';'))) *ptr = 0;
     squash_guid(guids, packcode);
     msi_free( guids);
     msi_reg_set_val_str(hkey, INSTALLPROPERTY_PACKAGECODEW, packcode);
@@ -4328,7 +4326,7 @@ static UINT msi_publish_patches( MSIPACKAGE *package )
     LIST_FOR_EACH_ENTRY( patch, &package->patches, MSIPATCHINFO, entry )
     {
         squash_guid( patch->patchcode, patch_squashed );
-        len += strlenW( patch_squashed ) + 1;
+        len += lstrlenW( patch_squashed ) + 1;
     }
 
     p = all_patches = msi_alloc( (len + 1) * sizeof(WCHAR) );
@@ -4340,11 +4338,11 @@ static UINT msi_publish_patches( MSIPACKAGE *package )
         HKEY patch_key;
 
         squash_guid( patch->patchcode, p );
-        p += strlenW( p ) + 1;
+        p += lstrlenW( p ) + 1;
 
         res = RegSetValueExW( patches_key, patch_squashed, 0, REG_SZ,
                               (const BYTE *)patch->transforms,
-                              (strlenW(patch->transforms) + 1) * sizeof(WCHAR) );
+                              (lstrlenW(patch->transforms) + 1) * sizeof(WCHAR) );
         if (res != ERROR_SUCCESS)
             goto done;
 
@@ -4353,7 +4351,7 @@ static UINT msi_publish_patches( MSIPACKAGE *package )
             goto done;
 
         res = RegSetValueExW( patch_key, szLocalPackage, 0, REG_SZ, (const BYTE *)patch->localfile,
-                              (strlenW( patch->localfile ) + 1) * sizeof(WCHAR) );
+                              (lstrlenW( patch->localfile ) + 1) * sizeof(WCHAR) );
         RegCloseKey( patch_key );
         if (res != ERROR_SUCCESS)
             goto done;
@@ -4437,7 +4435,7 @@ static UINT ACTION_PublishProduct(MSIPACKAGE *package)
 
                 squash_guid(guid, packed);
                 msi_free(guid);
-                if (!strcmpW(packed, package_code))
+                if (!wcscmp(packed, package_code))
                 {
                     TRACE("re-publishing product - new package\n");
                     republish = TRUE;
@@ -4499,7 +4497,7 @@ static WCHAR *get_ini_file_name( MSIPACKAGE *package, MSIRECORD *row )
     const WCHAR *dirprop;
 
     filename = msi_dup_record_field( row, 2 );
-    if (filename && (ptr = strchrW( filename, '|' )))
+    if (filename && (ptr = wcschr( filename, '|' )))
         ptr++;
     else
         ptr = filename;
@@ -4794,10 +4792,10 @@ static void register_dll( const WCHAR *dll, BOOL unregister )
     STARTUPINFOW si;
     WCHAR *cmd;
 
-    if (!(cmd = msi_alloc( strlenW(dll) * sizeof(WCHAR) + sizeof(unregW) ))) return;
+    if (!(cmd = msi_alloc( lstrlenW(dll) * sizeof(WCHAR) + sizeof(unregW) ))) return;
 
-    if (unregister) sprintfW( cmd, unregW, dll );
-    else sprintfW( cmd, regW, dll );
+    if (unregister) swprintf( cmd, lstrlenW(dll) + ARRAY_SIZE(unregW), unregW, dll );
+    else swprintf( cmd, lstrlenW(dll) + ARRAY_SIZE(unregW), regW, dll );
 
     memset( &si, 0, sizeof(STARTUPINFOW) );
     if (CreateProcessW( NULL, cmd, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi ))
@@ -4961,7 +4959,7 @@ static UINT ACTION_PublishFeatures(MSIPACKAGE *package)
             size += 21;
         }
         if (feature->Feature_Parent)
-            size += strlenW( feature->Feature_Parent )+2;
+            size += lstrlenW( feature->Feature_Parent )+2;
 
         data = msi_alloc(size * sizeof(WCHAR));
 
@@ -4978,15 +4976,15 @@ static UINT ACTION_PublishFeatures(MSIPACKAGE *package)
                 CLSIDFromString(component->ComponentId, &clsid);
                 encode_base85_guid(&clsid,buf);
                 TRACE("to %s\n",debugstr_w(buf));
-                strcatW(data,buf);
+                lstrcatW(data,buf);
             }
         }
 
         if (feature->Feature_Parent)
         {
             static const WCHAR sep[] = {'\2',0};
-            strcatW(data,sep);
-            strcatW(data,feature->Feature_Parent);
+            lstrcatW(data,sep);
+            lstrcatW(data,feature->Feature_Parent);
         }
 
         msi_reg_set_val_str( userdata, feature->Feature, data );
@@ -4994,7 +4992,7 @@ static UINT ACTION_PublishFeatures(MSIPACKAGE *package)
 
         size = 0;
         if (feature->Feature_Parent)
-            size = strlenW(feature->Feature_Parent)*sizeof(WCHAR);
+            size = lstrlenW(feature->Feature_Parent)*sizeof(WCHAR);
         if (!absent)
         {
             size += sizeof(WCHAR);
@@ -5008,7 +5006,7 @@ static UINT ACTION_PublishFeatures(MSIPACKAGE *package)
             data[0] = 0x6;
             data[1] = 0;
             if (feature->Feature_Parent)
-                strcpyW( &data[1], feature->Feature_Parent );
+                lstrcpyW( &data[1], feature->Feature_Parent );
             RegSetValueExW(hkey,feature->Feature,0,REG_SZ,
                        (LPBYTE)data,size);
             msi_free(data);
@@ -5223,7 +5221,7 @@ static UINT msi_publish_install_properties(MSIPACKAGE *package, HKEY hkey)
     msi_reg_set_val_dword(hkey, szEstimatedSize, 0);
 
     GetLocalTime(&systime);
-    sprintfW(date, date_fmt, systime.wYear, systime.wMonth, systime.wDay);
+    swprintf(date, ARRAY_SIZE(date), date_fmt, systime.wYear, systime.wMonth, systime.wDay);
     msi_reg_set_val_str(hkey, INSTALLPROPERTY_INSTALLDATEW, date);
 
     langid = msi_get_property_int(package->db, szProductLanguage, 0);
@@ -5316,7 +5314,7 @@ static UINT ITERATE_UnpublishIcon( MSIRECORD *row, LPVOID param )
     {
         TRACE("removing icon file %s\n", debugstr_w(icon_path));
         msi_delete_file( package, icon_path );
-        if ((p = strrchrW( icon_path, '\\' )))
+        if ((p = wcsrchr( icon_path, '\\' )))
         {
             *p = 0;
             msi_remove_directory( package, icon_path );
@@ -5400,7 +5398,7 @@ static UINT ACTION_UnpublishProduct(MSIPACKAGE *package)
     LIST_FOR_EACH_ENTRY(patch, &package->patches, MSIPATCHINFO, entry)
     {
         MSIREG_DeleteUserDataPatchKey(patch->patchcode, package->Context);
-        if (!strcmpW( package->ProductCode, patch->products ))
+        if (!wcscmp( package->ProductCode, patch->products ))
         {
             TRACE("removing local patch package %s\n", debugstr_w(patch->localfile));
             patch->delete_on_close = TRUE;
@@ -5479,7 +5477,7 @@ UINT ACTION_ForceReboot(MSIPACKAGE *package)
 
     GetSystemDirectoryW(sysdir, ARRAY_SIZE(sysdir));
     RegCreateKeyW(HKEY_LOCAL_MACHINE,RunOnce,&hkey);
-    snprintfW(buffer, ARRAY_SIZE(buffer), msiexec_fmt, sysdir, squashed_pc);
+    swprintf(buffer, ARRAY_SIZE(buffer), msiexec_fmt, sysdir, squashed_pc);
 
     msi_reg_set_val_str( hkey, squashed_pc, buffer );
     RegCloseKey(hkey);
@@ -5487,7 +5485,7 @@ UINT ACTION_ForceReboot(MSIPACKAGE *package)
     TRACE("Reboot command %s\n",debugstr_w(buffer));
 
     RegCreateKeyW(HKEY_LOCAL_MACHINE,InstallRunOnce,&hkey);
-    sprintfW( buffer, install_fmt, package->ProductCode, squashed_pc );
+    swprintf( buffer, ARRAY_SIZE(buffer), install_fmt, package->ProductCode, squashed_pc );
 
     msi_reg_set_val_str( hkey, squashed_pc, buffer );
     RegCloseKey(hkey);
@@ -5674,10 +5672,10 @@ static UINT ACTION_ExecuteAction(MSIPACKAGE *package)
     package->LastActionResult = MSI_NULL_INTEGER;
 
     action = msi_dup_property(package->db, szEXECUTEACTION);
-    if (!action) action = msi_strdupW(szINSTALL, strlenW(szINSTALL));
+    if (!action) action = msi_strdupW(szINSTALL, lstrlenW(szINSTALL));
 
     /* Perform the action. Top-level actions trigger a sequence. */
-    if (!strcmpW(action, szINSTALL))
+    if (!wcscmp(action, szINSTALL))
     {
         /* Send ACTIONSTART/INFO and INSTALLSTART. */
         ui_actionstart(package, szINSTALL, NULL, NULL);
@@ -5779,9 +5777,9 @@ WCHAR *msi_create_component_advertise_string( MSIPACKAGE *package, MSICOMPONENT
     TRACE("product=%s feature=%s component=%s\n", debugstr_w(productid_85), debugstr_w(feature),
           debugstr_w(component_85));
 
-    sz = 20 + strlenW( feature ) + 20 + 3;
+    sz = 20 + lstrlenW( feature ) + 20 + 3;
     ret = msi_alloc_zero( sz * sizeof(WCHAR) );
-    if (ret) sprintfW( ret, fmt, productid_85, feature, component ? '>' : '<', component_85 );
+    if (ret) swprintf( ret, sz, fmt, productid_85, feature, component ? '>' : '<', component_85 );
     return ret;
 }
 
@@ -5828,21 +5826,21 @@ static UINT ITERATE_PublishComponent(MSIRECORD *rec, LPVOID param)
     text = MSI_RecordGetString( rec, 4 );
     if (text)
     {
-        p = msi_alloc( (strlenW( advertise ) + strlenW( text ) + 1) * sizeof(WCHAR) );
-        strcpyW( p, advertise );
-        strcatW( p, text );
+        p = msi_alloc( (lstrlenW( advertise ) + lstrlenW( text ) + 1) * sizeof(WCHAR) );
+        lstrcpyW( p, advertise );
+        lstrcatW( p, text );
         msi_free( advertise );
         advertise = p;
     }
     existing = msi_reg_get_val_str( hkey, qualifier );
 
-    sz = strlenW( advertise ) + 1;
+    sz = lstrlenW( advertise ) + 1;
     if (existing)
     {
         for (p = existing; *p; p += len)
         {
-            len = strlenW( p ) + 1;
-            if (strcmpW( advertise, p )) sz += len;
+            len = lstrlenW( p ) + 1;
+            if (wcscmp( advertise, p )) sz += len;
         }
     }
     if (!(output = msi_alloc( (sz + 1) * sizeof(WCHAR) )))
@@ -5855,16 +5853,16 @@ static UINT ITERATE_PublishComponent(MSIRECORD *rec, LPVOID param)
     {
         for (p = existing; *p; p += len)
         {
-            len = strlenW( p ) + 1;
-            if (strcmpW( advertise, p ))
+            len = lstrlenW( p ) + 1;
+            if (wcscmp( advertise, p ))
             {
                 memcpy( q, p, len * sizeof(WCHAR) );
                 q += len;
             }
         }
     }
-    strcpyW( q, advertise );
-    q[strlenW( q ) + 1] = 0;
+    lstrcpyW( q, advertise );
+    q[lstrlenW( q ) + 1] = 0;
 
     msi_reg_set_val_multi_str( hkey, qualifier, output );
     
@@ -5946,8 +5944,8 @@ static UINT ITERATE_UnpublishComponent( MSIRECORD *rec, LPVOID param )
     qualifier = MSI_RecordGetString( rec, 2 );
 
     squash_guid( compgroupid, squashed );
-    strcpyW( keypath, szInstallerComponents );
-    strcatW( keypath, squashed );
+    lstrcpyW( keypath, szInstallerComponents );
+    lstrcatW( keypath, squashed );
 
     res = RegDeleteKeyW( HKEY_CURRENT_USER, keypath );
     if (res != ERROR_SUCCESS)
@@ -6068,16 +6066,16 @@ static UINT ITERATE_InstallService(MSIRECORD *rec, LPVOID param)
     if (!args || !args[0]) image_path = file->TargetPath;
     else
     {
-        int len = strlenW(file->TargetPath) + strlenW(args) + 2;
+        int len = lstrlenW(file->TargetPath) + lstrlenW(args) + 2;
         if (!(image_path = msi_alloc(len * sizeof(WCHAR))))
         {
             ret = ERROR_OUTOFMEMORY;
             goto done;
         }
 
-        strcpyW(image_path, file->TargetPath);
-        strcatW(image_path, szSpace);
-        strcatW(image_path, args);
+        lstrcpyW(image_path, file->TargetPath);
+        lstrcatW(image_path, szSpace);
+        lstrcatW(image_path, args);
     }
     service = CreateServiceW(hscm, name, disp, GENERIC_ALL, serv_type,
                              start_type, err_control, image_path, load_order,
@@ -6160,7 +6158,7 @@ static LPCWSTR *msi_service_args_to_vector(LPWSTR args, DWORD *numargs)
         (*numargs)++;
         vector[*numargs - 1] = p;
 
-        if ((q = strstrW(p, separator)))
+        if ((q = wcsstr(p, separator)))
         {
             *q = '\0';
 
@@ -6618,12 +6616,12 @@ static UINT ITERATE_InstallODBCDriver( MSIRECORD *rec, LPVOID param )
     lstrcpyW(ptr, desc);
     ptr += lstrlenW(ptr) + 1;
 
-    len = sprintfW(ptr, driver_fmt, driver_file->FileName);
+    len = swprintf(ptr, len - (ptr - driver), driver_fmt, driver_file->FileName);
     ptr += len + 1;
 
     if (setup_file)
     {
-        len = sprintfW(ptr, setup_fmt, setup_file->FileName);
+        len = swprintf(ptr, len - (ptr - driver), setup_fmt, setup_file->FileName);
         ptr += len + 1;
     }
 
@@ -6637,7 +6635,7 @@ static UINT ITERATE_InstallODBCDriver( MSIRECORD *rec, LPVOID param )
         driver_file->TargetPath = msi_build_directory_name( 2, dir, driver_file->FileName );
     }
     driver_path = strdupW(driver_file->TargetPath);
-    ptr = strrchrW(driver_path, '\\');
+    ptr = wcsrchr(driver_path, '\\');
     if (ptr) *ptr = '\0';
 
     if (!SQLInstallDriverExW(driver, driver_path, outpath, MAX_PATH,
@@ -6714,18 +6712,18 @@ static UINT ITERATE_InstallODBCTranslator( MSIRECORD *rec, LPVOID param )
     lstrcpyW(ptr, desc);
     ptr += lstrlenW(ptr) + 1;
 
-    len = sprintfW(ptr, translator_fmt, translator_file->FileName);
+    len = swprintf(ptr, len - (ptr - translator), translator_fmt, translator_file->FileName);
     ptr += len + 1;
 
     if (setup_file)
     {
-        len = sprintfW(ptr, setup_fmt, setup_file->FileName);
+        len = swprintf(ptr, len - (ptr - translator), setup_fmt, setup_file->FileName);
         ptr += len + 1;
     }
     *ptr = '\0';
 
     translator_path = strdupW(translator_file->TargetPath);
-    ptr = strrchrW(translator_path, '\\');
+    ptr = wcsrchr(translator_path, '\\');
     if (ptr) *ptr = '\0';
 
     if (!SQLInstallTranslatorExW(translator, translator_path, outpath, MAX_PATH,
@@ -6787,7 +6785,7 @@ static UINT ITERATE_InstallODBCDataSource( MSIRECORD *rec, LPVOID param )
     if (!attrs)
         return ERROR_OUTOFMEMORY;
 
-    len = sprintfW(attrs, attrs_fmt, desc);
+    len = swprintf(attrs, len, attrs_fmt, desc);
     attrs[len + 1] = 0;
 
     if (!SQLConfigDataSourceW(NULL, request, driver, attrs))
@@ -6963,14 +6961,14 @@ static UINT ITERATE_RemoveODBCDataSource( MSIRECORD *rec, LPVOID param )
     if (registration == msidbODBCDataSourceRegistrationPerMachine) request = ODBC_REMOVE_SYS_DSN;
     else if (registration == msidbODBCDataSourceRegistrationPerUser) request = ODBC_REMOVE_DSN;
 
-    len = strlenW( attrs_fmt ) + strlenW( desc ) + 2; /* \0\0 */
+    len = lstrlenW( attrs_fmt ) + lstrlenW( desc ) + 2; /* \0\0 */
     attrs = msi_alloc( len * sizeof(WCHAR) );
     if (!attrs)
         return ERROR_OUTOFMEMORY;
 
     FIXME("Use ODBCSourceAttribute table\n");
 
-    len = sprintfW( attrs, attrs_fmt, desc );
+    len = swprintf( attrs, len, attrs_fmt, desc );
     attrs[len + 1] = 0;
 
     if (!SQLConfigDataSourceW( NULL, request, driver, attrs ))
@@ -7081,7 +7079,7 @@ static UINT env_parse_flags( LPCWSTR *name, LPCWSTR *value, DWORD *flags )
     if (*value)
     {
         LPCWSTR ptr = *value;
-        if (!strncmpW(ptr, prefix, prefix_len))
+        if (!wcsncmp(ptr, prefix, prefix_len))
         {
             if (ptr[prefix_len] == szSemiColon[0])
             {
@@ -7096,7 +7094,7 @@ static UINT env_parse_flags( LPCWSTR *name, LPCWSTR *value, DWORD *flags )
         else if (lstrlenW(*value) >= prefix_len)
         {
             ptr += lstrlenW(ptr) - prefix_len;
-            if (!strcmpW( ptr, prefix ))
+            if (!wcscmp( ptr, prefix ))
             {
                 if ((ptr-1) > *value && *(ptr-1) == szSemiColon[0])
                 {
@@ -7203,15 +7201,15 @@ static UINT ITERATE_WriteEnvironmentString( MSIRECORD *rec, LPVOID param )
     {
         if (flags & ENV_MOD_PREFIX)
         {
-            p = strrchrW( value, ';' );
+            p = wcsrchr( value, ';' );
             len_value = p - value;
         }
         else if (flags & ENV_MOD_APPEND)
         {
-            value = strchrW( value, ';' ) + 1;
-            len_value = strlenW( value );
+            value = wcschr( value, ';' ) + 1;
+            len_value = lstrlenW( value );
         }
-        else len_value = strlenW( value );
+        else len_value = lstrlenW( value );
     }
 
     res = open_env_key( flags, &env );
@@ -7268,7 +7266,7 @@ static UINT ITERATE_WriteEnvironmentString( MSIRECORD *rec, LPVOID param )
         if (res != ERROR_SUCCESS)
             goto done;
 
-        if (flags & ENV_ACT_REMOVEMATCH && (!value || !strcmpW( data, value )))
+        if (flags & ENV_ACT_REMOVEMATCH && (!value || !wcscmp( data, value )))
         {
             action = 0x4;
             res = RegDeleteValueW(env, name);
@@ -7297,7 +7295,7 @@ static UINT ITERATE_WriteEnvironmentString( MSIRECORD *rec, LPVOID param )
             goto done;
         }
 
-        size = (len_value + 1 + strlenW( data ) + 1) * sizeof(WCHAR);
+        size = (len_value + 1 + lstrlenW( data ) + 1) * sizeof(WCHAR);
         if (!(p = newval = msi_alloc( size )))
         {
             res = ERROR_OUTOFMEMORY;
@@ -7312,11 +7310,11 @@ static UINT ITERATE_WriteEnvironmentString( MSIRECORD *rec, LPVOID param )
             action |= 0x80000000;
         }
 
-        strcpyW( p, data );
+        lstrcpyW( p, data );
 
         if (flags & ENV_MOD_APPEND)
         {
-            p += strlenW( data );
+            p += lstrlenW( data );
             *p++ = ';';
             memcpy( p, value, (len_value + 1) * sizeof(WCHAR) );
             action |= 0x40000000;
@@ -7410,15 +7408,15 @@ static UINT ITERATE_RemoveEnvironmentString( MSIRECORD *rec, LPVOID param )
     {
         if (flags & ENV_MOD_PREFIX)
         {
-            p = strchrW( value, ';' );
+            p = wcschr( value, ';' );
             len_value = p - value;
         }
         else if (flags & ENV_MOD_APPEND)
         {
-            value = strchrW( value, ';' ) + 1;
-            len_value = strlenW( value );
+            value = wcschr( value, ';' ) + 1;
+            len_value = lstrlenW( value );
         }
-        else len_value = strlenW( value );
+        else len_value = lstrlenW( value );
     }
 
     r = open_env_key( flags, &env );
@@ -7469,7 +7467,7 @@ static UINT ITERATE_RemoveEnvironmentString( MSIRECORD *rec, LPVOID param )
     else
     {
         TRACE("setting %s to %s\n", debugstr_w(name), debugstr_w(new_value));
-        size = (strlenW( new_value ) + 1) * sizeof(WCHAR);
+        size = (lstrlenW( new_value ) + 1) * sizeof(WCHAR);
         res = RegSetValueExW( env, name, 0, type, (BYTE *)new_value, size );
         if (res != ERROR_SUCCESS)
             WARN("failed to set %s to %s (%d)\n", debugstr_w(name), debugstr_w(new_value), res);
@@ -7632,9 +7630,9 @@ static UINT ITERATE_RemoveExistingProducts( MSIRECORD *rec, LPVOID param )
 
     deformat_string( package, MSI_RecordGetString( rec, 6 ), &features );
 
-    len += strlenW( product );
+    len += lstrlenW( product );
     if (features)
-        len += strlenW( features );
+        len += lstrlenW( features );
     else
         len += ARRAY_SIZE( szAll );
 
@@ -7644,7 +7642,7 @@ static UINT ITERATE_RemoveExistingProducts( MSIRECORD *rec, LPVOID param )
         msi_free( features );
         return ERROR_OUTOFMEMORY;
     }
-    sprintfW( cmd, fmtW, product, features ? features : szAll );
+    swprintf( cmd, len, fmtW, product, features ? features : szAll );
     msi_free( product );
     msi_free( features );
 
@@ -7962,7 +7960,7 @@ static UINT ACTION_HandleStandardAction(MSIPACKAGE *package, LPCWSTR action)
     i = 0;
     while (StandardActions[i].action != NULL)
     {
-        if (!strcmpW( StandardActions[i].action, action ))
+        if (!wcscmp( StandardActions[i].action, action ))
         {
             WCHAR description[100] = {0}, template[100] = {0};
 
@@ -8124,7 +8122,7 @@ UINT MSI_InstallPackage( MSIPACKAGE *package, LPCWSTR szPackagePath,
         LPCWSTR file;
 
         dir = strdupW(szPackagePath);
-        p = strrchrW(dir, '\\');
+        p = wcsrchr(dir, '\\');
         if (p)
         {
             *(++p) = 0;
@@ -8174,7 +8172,7 @@ UINT MSI_InstallPackage( MSIPACKAGE *package, LPCWSTR szPackagePath,
     start_dummy_thread(&thread_info);
 
     productcode = msi_dup_property( package->db, szProductCode );
-    if (strcmpiW( productcode, package->ProductCode ))
+    if (wcsicmp( productcode, package->ProductCode ))
     {
         TRACE( "product code changed %s -> %s\n", debugstr_w(package->ProductCode), debugstr_w(productcode) );
         msi_free( package->ProductCode );
diff --git a/dll/win32/msi/appsearch.c b/dll/win32/msi/appsearch.c
index 6b1768e8af2..dd58ccad702 100644
--- a/dll/win32/msi/appsearch.c
+++ b/dll/win32/msi/appsearch.c
@@ -29,7 +29,6 @@
 #include "msidefs.h"
 #include "winver.h"
 #include "shlwapi.h"
-#include "wine/unicode.h"
 #include "wine/debug.h"
 #include "msipriv.h"
 
@@ -55,20 +54,20 @@ void msi_parse_version_string(LPCWSTR verStr, PDWORD ms, PDWORD ls)
     const WCHAR *ptr;
     int x1 = 0, x2 = 0, x3 = 0, x4 = 0;
 
-    x1 = atoiW(verStr);
-    ptr = strchrW(verStr, '.');
+    x1 = wcstol(verStr, NULL, 10);
+    ptr = wcschr(verStr, '.');
     if (ptr)
     {
-        x2 = atoiW(ptr + 1);
-        ptr = strchrW(ptr + 1, '.');
+        x2 = wcstol(ptr + 1, NULL, 10);
+        ptr = wcschr(ptr + 1, '.');
     }
     if (ptr)
     {
-        x3 = atoiW(ptr + 1);
-        ptr = strchrW(ptr + 1, '.');
+        x3 = wcstol(ptr + 1, NULL, 10);
+        ptr = wcschr(ptr + 1, '.');
     }
     if (ptr)
-        x4 = atoiW(ptr + 1);
+        x4 = wcstol(ptr + 1, NULL, 10);
     /* FIXME: byte-order dependent? */
     *ms = x1 << 16 | x2;
     if (ls) *ls = x3 << 16 | x4;
@@ -106,10 +105,10 @@ static UINT get_signature( MSIPACKAGE *package, MSISIGNATURE *sig, const WCHAR *
 
     /* get properties */
     sig->File = msi_dup_record_field(row,2);
-    if ((p = strchrW(sig->File, '|')))
+    if ((p = wcschr(sig->File, '|')))
     {
         p++;
-        memmove(sig->File, p, (strlenW(p) + 1) * sizeof(WCHAR));
+        memmove(sig->File, p, (lstrlenW(p) + 1) * sizeof(WCHAR));
     }
 
     minVersion = msi_dup_record_field(row,3);
@@ -287,7 +286,7 @@ static UINT search_components( MSIPACKAGE *package, WCHAR **appValue, MSISIGNATU
     {
         if (type == msidbLocatorTypeFileName)
         {
-            ptr = strrchrW(path, '\\');
+            ptr = wcsrchr(path, '\\');
             *(ptr + 1) = '\0';
         }
         else
@@ -327,12 +326,12 @@ static void convert_reg_value( DWORD regType, const BYTE *value, DWORD sz, WCHAR
                 /* escape leading pound with another */
                 *appValue = msi_alloc(sz + sizeof(WCHAR));
                 (*appValue)[0] = '#';
-                strcpyW(*appValue + 1, (LPCWSTR)value);
+                lstrcpyW(*appValue + 1, (LPCWSTR)value);
             }
             else
             {
                 *appValue = msi_alloc(sz);
-                strcpyW(*appValue, (LPCWSTR)value);
+                lstrcpyW(*appValue, (LPCWSTR)value);
             }
             break;
         case REG_DWORD:
@@ -340,7 +339,7 @@ static void convert_reg_value( DWORD regType, const BYTE *value, DWORD sz, WCHAR
              * char if needed
              */
             *appValue = msi_alloc(10 * sizeof(WCHAR));
-            sprintfW(*appValue, dwordFmt, *(const DWORD *)value);
+            swprintf(*appValue, 10, dwordFmt, *(const DWORD *)value);
             break;
         case REG_EXPAND_SZ:
             sz = ExpandEnvironmentStringsW((LPCWSTR)value, NULL, 0);
@@ -353,7 +352,7 @@ static void convert_reg_value( DWORD regType, const BYTE *value, DWORD sz, WCHAR
             lstrcpyW(*appValue, binPre);
             ptr = *appValue + lstrlenW(binPre);
             for (i = 0; i < sz; i++, ptr += 2)
-                sprintfW(ptr, binFmt, value[i]);
+                swprintf(ptr, 3, binFmt, value[i]);
             break;
         default:
             WARN("unimplemented for values of type %d\n", regType);
@@ -463,7 +462,7 @@ static UINT search_reg( MSIPACKAGE *package, WCHAR **appValue, MSISIGNATURE *sig
     }
 
     if ((regType == REG_SZ || regType == REG_EXPAND_SZ) &&
-        (ptr = strchrW((LPWSTR)value, '"')) && (end = strchrW(++ptr, '"')))
+        (ptr = wcschr((LPWSTR)value, '"')) && (end = wcschr(++ptr, '"')))
         *end = '\0';
     else
         ptr = (LPWSTR)value;
@@ -501,7 +500,7 @@ static LPWSTR get_ini_field(LPWSTR buf, int field)
         return strdupW(buf);
 
     beg = buf;
-    while ((end = strchrW(beg, ',')) && i < field)
+    while ((end = wcschr(beg, ',')) && i < field)
     {
         beg = end + 1;
         while (*beg == ' ')
@@ -510,7 +509,7 @@ static LPWSTR get_ini_field(LPWSTR buf, int field)
         i++;
     }
 
-    end = strchrW(beg, ',');
+    end = wcschr(beg, ',');
     if (!end)
         end = beg + lstrlenW(beg);
 
@@ -600,13 +599,13 @@ static void expand_any_path( MSIPACKAGE *package, WCHAR *src, WCHAR *dst, size_t
     dst[0] = '\0';
 
     /* Ignore the short portion of the path */
-    if ((ptr = strchrW(src, '|')))
+    if ((ptr = wcschr(src, '|')))
         ptr++;
     else
         ptr = src;
 
     deformat_string(package, ptr, &deformatted);
-    if (!deformatted || strlenW(deformatted) > len - 1)
+    if (!deformatted || lstrlenW(deformatted) > len - 1)
     {
         msi_free(deformatted);
         return;
@@ -624,7 +623,7 @@ static LANGID *parse_languages( const WCHAR *languages, DWORD *num_ids )
     LANGID *ret;
 
     if (!str) return NULL;
-    for (p = q = str; (q = strchrW( q, ',' )); q++) count++;
+    for (p = q = str; (q = wcschr( q, ',' )); q++) count++;
 
     if (!(ret = msi_alloc( count * sizeof(LANGID) )))
     {
@@ -634,9 +633,9 @@ static LANGID *parse_languages( const WCHAR *languages, DWORD *num_ids )
     i = 0;
     while (*p)
     {
-        q = strchrW( p, ',' );
+        q = wcschr( p, ',' );
         if (q) *q = 0;
-        ret[i] = atoiW( p );
+        ret[i] = wcstol( p, NULL, 10 );
         if (!q) break;
         p = q + 1;
         i++;
@@ -808,7 +807,7 @@ static UINT recurse_search_directory( MSIPACKAGE *package, WCHAR **appValue, MSI
      * here.  Add two because we might need to add a backslash if the dir name
      * isn't backslash-terminated.
      */
-    len = dirLen + max(fileLen, strlenW(starDotStarW)) + 2;
+    len = dirLen + max(fileLen, lstrlenW(starDotStarW)) + 2;
     buf = msi_alloc(len * sizeof(WCHAR));
     if (!buf)
         return ERROR_OUTOFMEMORY;
@@ -844,8 +843,8 @@ static UINT recurse_search_directory( MSIPACKAGE *package, WCHAR **appValue, MSI
         if (hFind != INVALID_HANDLE_VALUE)
         {
             if (findData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY &&
-                strcmpW( findData.cFileName, szDot ) &&
-                strcmpW( findData.cFileName, szDotDot ))
+                wcscmp( findData.cFileName, szDot ) &&
+                wcscmp( findData.cFileName, szDotDot ))
             {
                 lstrcpyW(subpath, dir);
                 PathAppendW(subpath, findData.cFileName);
@@ -854,8 +853,8 @@ static UINT recurse_search_directory( MSIPACKAGE *package, WCHAR **appValue, MSI
 
             while (rc == ERROR_SUCCESS && !*appValue && msi_find_next_file( package, hFind, &findData ))
             {
-                if (!strcmpW( findData.cFileName, szDot ) ||
-                    !strcmpW( findData.cFileName, szDotDot ))
+                if (!wcscmp( findData.cFileName, szDot ) ||
+                    !wcscmp( findData.cFileName, szDotDot ))
                     continue;
 
                 lstrcpyW(subpath, dir);
@@ -889,7 +888,7 @@ static UINT check_directory( MSIPACKAGE *package, const WCHAR *dir, WCHAR **appV
 
 static BOOL is_full_path( const WCHAR *path )
 {
-    WCHAR first = toupperW(path[0]);
+    WCHAR first = towupper(path[0]);
     BOOL ret;
 
     if (first >= 'A' && first <= 'Z' && path[1] == ':')
@@ -1019,7 +1018,7 @@ static UINT search_dr( MSIPACKAGE *package, WCHAR **appValue, MSISIGNATURE *sig
     if (sz)
         expand_any_path( package, path, expanded, MAX_PATH );
     else
-        strcpyW(expanded, path);
+        lstrcpyW(expanded, path);
 
     if (parent)
     {
@@ -1031,10 +1030,10 @@ static UINT search_dr( MSIPACKAGE *package, WCHAR **appValue, MSISIGNATURE *sig
             PathAddBackslashW(parent);
         }
 
-        strcpyW(path, parent);
-        strcatW(path, expanded);
+        lstrcpyW(path, parent);
+        lstrcatW(path, expanded);
     }
-    else if (sz) strcpyW(path, expanded);
+    else if (sz) lstrcpyW(path, expanded);
 
     PathAddBackslashW(path);
 
@@ -1088,7 +1087,7 @@ static UINT ITERATE_AppSearch(MSIRECORD *row, LPVOID param)
     if (value)
     {
         r = msi_set_property( package->db, propName, value, -1 );
-        if (r == ERROR_SUCCESS && !strcmpW( propName, szSourceDir ))
+        if (r == ERROR_SUCCESS && !wcscmp( propName, szSourceDir ))
             msi_reset_source_folders( package );
 
         msi_free(value);
diff --git a/dll/win32/msi/assembly.c b/dll/win32/msi/assembly.c
index 2a293956c85..bd694333d2a 100644
--- a/dll/win32/msi/assembly.c
+++ b/dll/win32/msi/assembly.c
@@ -26,7 +26,6 @@
 #include "winbase.h"
 #include "winreg.h"
 #include "wine/debug.h"
-#include "wine/unicode.h"
 #include "msipriv.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(msi);
@@ -43,7 +42,7 @@ static BOOL load_fusion_dlls( MSIPACKAGE *package )
     WCHAR path[MAX_PATH];
     DWORD len = GetSystemDirectoryW( path, MAX_PATH );
 
-    strcpyW( path + len, szMscoree );
+    lstrcpyW( path + len, szMscoree );
     if (package->hmscoree || !(package->hmscoree = LoadLibraryW( path ))) return TRUE;
     if (!(pLoadLibraryShim = (void *)GetProcAddress( package->hmscoree, "LoadLibraryShim" )))
     {
@@ -176,13 +175,13 @@ static UINT get_assembly_name_attribute( MSIRECORD *rec, LPVOID param )
     struct assembly_name *name = param;
     const WCHAR *attr = MSI_RecordGetString( rec, 2 );
     const WCHAR *value = MSI_RecordGetString( rec, 3 );
-    int len = strlenW( fmtW ) + strlenW( attr ) + strlenW( value );
+    int len = lstrlenW( fmtW ) + lstrlenW( attr ) + lstrlenW( value );
 
     if (!(name->attrs[name->index] = msi_alloc( len * sizeof(WCHAR) )))
         return ERROR_OUTOFMEMORY;
 
-    if (!strcmpiW( attr, nameW )) strcpyW( name->attrs[name->index++], value );
-    else sprintfW( name->attrs[name->index++], fmtW, attr, value );
+    if (!wcsicmp( attr, nameW )) lstrcpyW( name->attrs[name->index++], value );
+    else swprintf( name->attrs[name->index++], len, fmtW, attr, value );
     return ERROR_SUCCESS;
 }
 
@@ -216,7 +215,7 @@ static WCHAR *get_assembly_display_name( MSIDATABASE *db, const WCHAR *comp, MSI
     MSI_IterateRecords( view, NULL, get_assembly_name_attribute, &name );
 
     len = 0;
-    for (i = 0; i < name.count; i++) len += strlenW( name.attrs[i] ) + 1;
+    for (i = 0; i < name.count; i++) len += lstrlenW( name.attrs[i] ) + 1;
 
     display_name = msi_alloc( (len + 1) * sizeof(WCHAR) );
     if (display_name)
@@ -224,8 +223,8 @@ static WCHAR *get_assembly_display_name( MSIDATABASE *db, const WCHAR *comp, MSI
         display_name[0] = 0;
         for (i = 0; i < name.count; i++)
         {
-            strcatW( display_name, name.attrs[i] );
-            if (i < name.count - 1) strcatW( display_name, commaW );
+            lstrcatW( display_name, name.attrs[i] );
+            if (i < name.count - 1) lstrcatW( display_name, commaW );
         }
     }
 
@@ -427,7 +426,7 @@ static enum clr_version get_clr_version( MSIPACKAGE *package, const WCHAR *filen
         {
             UINT i;
             for (i = 0; i < CLR_VERSION_MAX; i++)
-                if (!strcmpW( strW, clr_version[i] )) version = i;
+                if (!wcscmp( strW, clr_version[i] )) version = i;
         }
         msi_free( strW );
     }
@@ -526,7 +525,7 @@ static WCHAR *build_local_assembly_path( const WCHAR *filename )
     UINT i;
     WCHAR *ret;
 
-    if (!(ret = msi_alloc( (strlenW( filename ) + 1) * sizeof(WCHAR) )))
+    if (!(ret = msi_alloc( (lstrlenW( filename ) + 1) * sizeof(WCHAR) )))
         return NULL;
 
     for (i = 0; filename[i]; i++)
diff --git a/dll/win32/msi/automation.c b/dll/win32/msi/automation.c
index 80254e6df45..ba3a068a74b 100644
--- a/dll/win32/msi/automation.c
+++ b/dll/win32/msi/automation.c
@@ -32,7 +32,6 @@
 #include "oleauto.h"
 #include "shlwapi.h"
 #include "wine/debug.h"
-#include "wine/unicode.h"
 
 #include "msiserver.h"
 #include "msiserver_dispids.h"
@@ -1976,7 +1975,7 @@ static HRESULT InstallerImpl_Version(WORD wFlags,
     if (FAILED(hr))
         return hr;
 
-    sprintfW(version, format, verinfo.dwMajorVersion, verinfo.dwMinorVersion,
+    swprintf(version, ARRAY_SIZE(version), format, verinfo.dwMajorVersion, verinfo.dwMinorVersion,
              verinfo.dwBuildNumber, verinfo.dwPlatformID);
 
     V_VT(pVarResult) = VT_BSTR;
diff --git a/dll/win32/msi/classes.c b/dll/win32/msi/classes.c
index 7b0a4a4d0e6..4e0c1a68098 100644
--- a/dll/win32/msi/classes.c
+++ b/dll/win32/msi/classes.c
@@ -39,7 +39,6 @@
 #include "wine/debug.h"
 #include "msipriv.h"
 #include "winuser.h"
-#include "wine/unicode.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(msi);
 
@@ -87,7 +86,7 @@ static MSIAPPID *load_given_appid( MSIPACKAGE *package, LPCWSTR name )
     /* check for appids already loaded */
     LIST_FOR_EACH_ENTRY( appid, &package->appids, MSIAPPID, entry )
     {
-        if (!strcmpiW( appid->AppID, name ))
+        if (!wcsicmp( appid->AppID, name ))
         {
             TRACE("found appid %s %p\n", debugstr_w(name), appid);
             return appid;
@@ -143,9 +142,9 @@ static MSIPROGID *load_progid( MSIPACKAGE* package, MSIRECORD *row )
 
         FilePath = msi_build_icon_path(package, FileName);
        
-        progid->IconPath = msi_alloc( (strlenW(FilePath)+10)* sizeof(WCHAR) );
+        progid->IconPath = msi_alloc( (lstrlenW(FilePath)+10)* sizeof(WCHAR) );
 
-        sprintfW(progid->IconPath,fmt,FilePath,icon_index);
+        swprintf(progid->IconPath,lstrlenW(FilePath)+10,fmt,FilePath,icon_index);
 
         msi_free(FilePath);
     }
@@ -191,7 +190,7 @@ static MSIPROGID *load_given_progid(MSIPACKAGE *package, LPCWSTR name)
     /* check for progids already loaded */
     LIST_FOR_EACH_ENTRY( progid, &package->progids, MSIPROGID, entry )
     {
-        if (!strcmpiW( progid->ProgID, name ))
+        if (!wcsicmp( progid->ProgID, name ))
         {
             TRACE("found progid %s (%p)\n",debugstr_w(name), progid );
             return progid;
@@ -248,9 +247,9 @@ static MSICLASS *load_class( MSIPACKAGE* package, MSIRECORD *row )
 
         FilePath = msi_build_icon_path(package, FileName);
        
-        cls->IconPath = msi_alloc( (strlenW(FilePath)+5)* sizeof(WCHAR) );
+        cls->IconPath = msi_alloc( (lstrlenW(FilePath)+5)* sizeof(WCHAR) );
 
-        sprintfW(cls->IconPath,fmt,FilePath,icon_index);
+        swprintf(cls->IconPath,lstrlenW(FilePath)+5,fmt,FilePath,icon_index);
 
         msi_free(FilePath);
     }
@@ -321,7 +320,7 @@ static MSICLASS *load_given_class(MSIPACKAGE *package, LPCWSTR classid)
     /* check for classes already loaded */
     LIST_FOR_EACH_ENTRY( cls, &package->classes, MSICLASS, entry )
     {
-        if (!strcmpiW( cls->clsid, classid ))
+        if (!wcsicmp( cls->clsid, classid ))
         {
             TRACE("found class %s (%p)\n",debugstr_w(classid), cls);
             return cls;
@@ -380,7 +379,7 @@ static MSIMIME *load_given_mime( MSIPACKAGE *package, LPCWSTR mime )
     /* check for mime already loaded */
     LIST_FOR_EACH_ENTRY( mt, &package->mimes, MSIMIME, entry )
     {
-        if (!strcmpiW( mt->ContentType, mime ))
+        if (!wcsicmp( mt->ContentType, mime ))
         {
             TRACE("found mime %s (%p)\n",debugstr_w(mime), mt);
             return mt;
@@ -451,7 +450,7 @@ static MSIEXTENSION *load_given_extension( MSIPACKAGE *package, LPCWSTR name )
     /* check for extensions already loaded */
     LIST_FOR_EACH_ENTRY( ext, &package->extensions, MSIEXTENSION, entry )
     {
-        if (!strcmpiW( ext->Extension, name ))
+        if (!wcsicmp( ext->Extension, name ))
         {
             TRACE("extension %s already loaded %p\n", debugstr_w(name), ext);
             return ext;
@@ -521,9 +520,9 @@ static UINT iterate_all_classes(MSIRECORD *rec, LPVOID param)
 
     LIST_FOR_EACH_ENTRY( cls, &package->classes, MSICLASS, entry )
     {
-        if (strcmpiW( clsid, cls->clsid ))
+        if (wcsicmp( clsid, cls->clsid ))
             continue;
-        if (strcmpW( context, cls->Context ))
+        if (wcscmp( context, cls->Context ))
             continue;
         if (comp == cls->Component)
         {
@@ -569,7 +568,7 @@ static UINT iterate_all_extensions(MSIRECORD *rec, LPVOID param)
 
     LIST_FOR_EACH_ENTRY( ext, &package->extensions, MSIEXTENSION, entry )
     {
-        if (strcmpiW(extension, ext->Extension))
+        if (wcsicmp(extension, ext->Extension))
             continue;
         if (comp == ext->Component)
         {
@@ -884,11 +883,12 @@ UINT ACTION_RegisterClassInfo(MSIPACKAGE *package)
             ptr = cls->FileTypeMask;
             while (ptr && *ptr)
             {
-                ptr2 = strchrW(ptr,';');
+                ptr2 = wcschr(ptr,';');
                 if (ptr2)
                     *ptr2 = 0;
-                keyname = msi_alloc( (strlenW(szFileType_fmt) + strlenW(cls->clsid) + 4) * sizeof(WCHAR));
-                sprintfW( keyname, szFileType_fmt, cls->clsid, index );
+                keyname = msi_alloc( (lstrlenW(szFileType_fmt) + lstrlenW(cls->clsid) + 4) * sizeof(WCHAR));
+                swprintf( keyname, lstrlenW(szFileType_fmt) + lstrlenW(cls->clsid) + 4,
+                          szFileType_fmt, cls->clsid, index );
 
                 msi_reg_set_subkey_val( HKEY_CLASSES_ROOT, keyname, NULL, ptr );
                 msi_free(keyname);
@@ -984,11 +984,11 @@ UINT ACTION_UnregisterClassInfo( MSIPACKAGE *package )
         }
         if (cls->FileTypeMask)
         {
-            filetype = msi_alloc( (strlenW( szFileType ) + strlenW( cls->clsid ) + 1) * sizeof(WCHAR) );
+            filetype = msi_alloc( (lstrlenW( szFileType ) + lstrlenW( cls->clsid ) + 1) * sizeof(WCHAR) );
             if (filetype)
             {
-                strcpyW( filetype, szFileType );
-                strcatW( filetype, cls->clsid );
+                lstrcpyW( filetype, szFileType );
+                lstrcatW( filetype, cls->clsid );
                 res = RegDeleteTreeW( HKEY_CLASSES_ROOT, filetype );
                 msi_free( filetype );
 
@@ -1198,35 +1198,35 @@ static UINT register_verb(MSIPACKAGE *package, LPCWSTR progid,
 
     TRACE("Making Key %s\n",debugstr_w(keyname));
     RegCreateKeyW(HKEY_CLASSES_ROOT, keyname, &key);
-    size = strlenW(component->FullKeypath);
+    size = lstrlenW(component->FullKeypath);
     if (verb->Argument)
-        size += strlenW(verb->Argument);
+        size += lstrlenW(verb->Argument);
      size += 4;
 
      command = msi_alloc(size * sizeof (WCHAR));
      if (verb->Argument)
-        sprintfW(command, fmt, component->FullKeypath, verb->Argument);
+         swprintf(command, size, fmt, component->FullKeypath, verb->Argument);
      else
-        sprintfW(command, fmt2, component->FullKeypath);
+         swprintf(command, size, fmt2, component->FullKeypath);
 
      msi_reg_set_val_str( key, NULL, command );
      msi_free(command);
 
      advertise = msi_create_component_advertise_string(package, component,
                                                        extension->Feature->Feature);
-     size = strlenW(advertise);
+     size = lstrlenW(advertise);
 
      if (verb->Argument)
-         size += strlenW(verb->Argument);
+         size += lstrlenW(verb->Argument);
      size += 4;
 
      command = msi_alloc_zero(size * sizeof (WCHAR));
 
-     strcpyW(command,advertise);
+     lstrcpyW(command,advertise);
      if (verb->Argument)
      {
-         strcatW(command,szSpace);
-         strcatW(command,verb->Argument);
+         lstrcatW(command,szSpace);
+         lstrcatW(command,verb->Argument);
      }
 
      msi_reg_set_val_multi_str( key, szCommand, command );
@@ -1312,11 +1312,11 @@ UINT ACTION_RegisterExtensionInfo(MSIPACKAGE *package)
 
         ext->action = INSTALLSTATE_LOCAL;
 
-        extension = msi_alloc( (strlenW( ext->Extension ) + 2) * sizeof(WCHAR) );
+        extension = msi_alloc( (lstrlenW( ext->Extension ) + 2) * sizeof(WCHAR) );
         if (extension)
         {
             extension[0] = '.';
-            strcpyW( extension + 1, ext->Extension );
+            lstrcpyW( extension + 1, ext->Extension );
             res = RegCreateKeyW( HKEY_CLASSES_ROOT, extension, &hkey );
             msi_free( extension );
             if (res != ERROR_SUCCESS)
@@ -1343,10 +1343,10 @@ UINT ACTION_RegisterExtensionInfo(MSIPACKAGE *package)
 
             msi_reg_set_val_str( hkey, NULL, progid );
 
-            newkey = msi_alloc( (strlenW(progid)+strlenW(szSN)+1) * sizeof(WCHAR)); 
+            newkey = msi_alloc( (lstrlenW(progid)+lstrlenW(szSN)+1) * sizeof(WCHAR));
 
-            strcpyW(newkey,progid);
-            strcatW(newkey,szSN);
+            lstrcpyW(newkey,progid);
+            lstrcatW(newkey,szSN);
             RegCreateKeyW(hkey,newkey,&hkey2);
             RegCloseKey(hkey2);
 
@@ -1413,11 +1413,11 @@ UINT ACTION_UnregisterExtensionInfo( MSIPACKAGE *package )
 
         ext->action = INSTALLSTATE_ABSENT;
 
-        extension = msi_alloc( (strlenW( ext->Extension ) + 2) * sizeof(WCHAR) );
+        extension = msi_alloc( (lstrlenW( ext->Extension ) + 2) * sizeof(WCHAR) );
         if (extension)
         {
             extension[0] = '.';
-            strcpyW( extension + 1, ext->Extension );
+            lstrcpyW( extension + 1, ext->Extension );
             res = RegDeleteTreeW( HKEY_CLASSES_ROOT, extension );
             msi_free( extension );
             if (res != ERROR_SUCCESS)
@@ -1435,11 +1435,11 @@ UINT ACTION_UnregisterExtensionInfo( MSIPACKAGE *package )
             else
                 progid = ext->ProgIDText;
 
-            progid_shell = msi_alloc( (strlenW( progid ) + strlenW( shellW ) + 1) * sizeof(WCHAR) );
+            progid_shell = msi_alloc( (lstrlenW( progid ) + lstrlenW( shellW ) + 1) * sizeof(WCHAR) );
             if (progid_shell)
             {
-                strcpyW( progid_shell, progid );
-                strcatW( progid_shell, shellW );
+                lstrcpyW( progid_shell, progid );
+                lstrcatW( progid_shell, shellW );
                 res = RegDeleteTreeW( HKEY_CLASSES_ROOT, progid_shell );
                 msi_free( progid_shell );
                 if (res != ERROR_SUCCESS)
@@ -1487,16 +1487,16 @@ UINT ACTION_RegisterMIMEInfo(MSIPACKAGE *package)
 
         TRACE("Registering MIME type %s\n", debugstr_w(mt->ContentType));
 
-        if (mt->Extension) extension = msi_alloc( (strlenW( mt->Extension->Extension ) + 2) * sizeof(WCHAR) );
-        key = msi_alloc( (strlenW( mt->ContentType ) + strlenW( szMIMEDatabase ) + 1) * sizeof(WCHAR) );
+        if (mt->Extension) extension = msi_alloc( (lstrlenW( mt->Extension->Extension ) + 2) * sizeof(WCHAR) );
+        key = msi_alloc( (lstrlenW( mt->ContentType ) + lstrlenW( szMIMEDatabase ) + 1) * sizeof(WCHAR) );
 
         if (extension && key)
         {
             extension[0] = '.';
-            strcpyW( extension + 1, mt->Extension->Extension );
+            lstrcpyW( extension + 1, mt->Extension->Extension );
 
-            strcpyW( key, szMIMEDatabase );
-            strcatW( key, mt->ContentType );
+            lstrcpyW( key, szMIMEDatabase );
+            lstrcatW( key, mt->ContentType );
             msi_reg_set_subkey_val( HKEY_CLASSES_ROOT, key, szExtension, extension );
 
             if (mt->clsid)
@@ -1541,11 +1541,11 @@ UINT ACTION_UnregisterMIMEInfo( MSIPACKAGE *package )
 
         TRACE("Unregistering MIME type %s\n", debugstr_w(mime->ContentType));
 
-        mime_key = msi_alloc( (strlenW( szMIMEDatabase ) + strlenW( mime->ContentType ) + 1) * sizeof(WCHAR) );
+        mime_key = msi_alloc( (lstrlenW( szMIMEDatabase ) + lstrlenW( mime->ContentType ) + 1) * sizeof(WCHAR) );
         if (mime_key)
         {
-            strcpyW( mime_key, szMIMEDatabase );
-            strcatW( mime_key, mime->ContentType );
+            lstrcpyW( mime_key, szMIMEDatabase );
+            lstrcatW( mime_key, mime->ContentType );
             res = RegDeleteKeyW( HKEY_CLASSES_ROOT, mime_key );
             if (res != ERROR_SUCCESS)
                 WARN("Failed to delete MIME key %d\n", res);
diff --git a/dll/win32/msi/cond.y b/dll/win32/msi/cond.y
index fccb61489be..73aada5fad3 100644
--- a/dll/win32/msi/cond.y
+++ b/dll/win32/msi/cond.y
@@ -22,8 +22,6 @@
 
 #define COBJMACROS
 
-#include "config.h"
-
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -314,7 +312,7 @@ value:
             if( !szNum )
                 YYABORT;
             $$.type = VALUE_INTEGER;
-            $$.u.integer = atoiW( szNum );
+            $$.u.integer = wcstol( szNum, NULL, 10 );
             cond_free( szNum );
         }
   | COND_DOLLARS identifier
@@ -417,7 +415,7 @@ static WCHAR *strstriW( const WCHAR *str, const WCHAR *sub )
     LPWSTR strlower, sublower, r;
     strlower = CharLowerW( strdupW( str ) );
     sublower = CharLowerW( strdupW( sub ) );
-    r = strstrW( strlower, sublower );
+    r = wcsstr( strlower, sublower );
     if (r)
         r = (LPWSTR)str + (r - strlower);
     msi_free( strlower );
@@ -433,7 +431,7 @@ static BOOL str_is_number( LPCWSTR str )
         return FALSE;
 
     for (i = 0; i < lstrlenW( str ); i++)
-        if (!isdigitW(str[i]))
+        if (!iswdigit(str[i]))
             return FALSE;
 
     return TRUE;
@@ -452,44 +450,44 @@ static INT compare_substring( LPCWSTR a, INT operator, LPCWSTR b )
         return 1;
 
     /* if both strings contain only numbers, use integer comparison */
-    lhs = atoiW(a);
-    rhs = atoiW(b);
+    lhs = wcstol(a, NULL, 10);
+    rhs = wcstol(b, NULL, 10);
     if (str_is_number(a) && str_is_number(b))
         return compare_int( lhs, operator, rhs );
 
     switch (operator)
     {
     case COND_SS:
-        return strstrW( a, b ) != 0;
+        return wcsstr( a, b ) != 0;
     case COND_ISS:
         return strstriW( a, b ) != 0;
     case COND_LHS:
     {
-        int l = strlenW( a );
-        int r = strlenW( b );
+        int l = lstrlenW( a );
+        int r = lstrlenW( b );
         if (r > l) return 0;
-        return !strncmpW( a, b, r );
+        return !wcsncmp( a, b, r );
     }
     case COND_RHS:
     {
-        int l = strlenW( a );
-        int r = strlenW( b );
+        int l = lstrlenW( a );
+        int r = lstrlenW( b );
         if (r > l) return 0;
-        return !strncmpW( a + (l - r), b, r );
+        return !wcsncmp( a + (l - r), b, r );
     }
     case COND_ILHS:
     {
-        int l = strlenW( a );
-        int r = strlenW( b );
+        int l = lstrlenW( a );
+        int r = lstrlenW( b );
         if (r > l) return 0;
-        return !strncmpiW( a, b, r );
+        return !wcsnicmp( a, b, r );
     }
     case COND_IRHS:
     {
-        int l = strlenW( a );
-        int r = strlenW( b );
+        int l = lstrlenW( a );
+        int r = lstrlenW( b );
         if (r > l) return 0;
-        return !strncmpiW( a + (l - r), b, r );
+        return !wcsnicmp( a + (l - r), b, r );
     }
     default:
         ERR("invalid substring operator\n");
@@ -508,35 +506,35 @@ static INT compare_string( LPCWSTR a, INT operator, LPCWSTR b, BOOL convert )
     if (!b) b = szEmpty;
 
     if (convert && str_is_number(a) && str_is_number(b))
-        return compare_int( atoiW(a), operator, atoiW(b) );
+        return compare_int( wcstol(a, NULL, 10), operator, wcstol(b, NULL, 10) );
 
     /* a or b may be NULL */
     switch (operator)
     {
     case COND_LT:
-        return strcmpW( a, b ) < 0;
+        return wcscmp( a, b ) < 0;
     case COND_GT:
-        return strcmpW( a, b ) > 0;
+        return wcscmp( a, b ) > 0;
     case COND_EQ:
-        return strcmpW( a, b ) == 0;
+        return wcscmp( a, b ) == 0;
     case COND_NE:
-        return strcmpW( a, b ) != 0;
+        return wcscmp( a, b ) != 0;
     case COND_GE:
-        return strcmpW( a, b ) >= 0;
+        return wcscmp( a, b ) >= 0;
     case COND_LE:
-        return strcmpW( a, b ) <= 0;
+        return wcscmp( a, b ) <= 0;
     case COND_ILT:
-        return strcmpiW( a, b ) < 0;
+        return wcsicmp( a, b ) < 0;
     case COND_IGT:
-        return strcmpiW( a, b ) > 0;
+        return wcsicmp( a, b ) > 0;
     case COND_IEQ:
-        return strcmpiW( a, b ) == 0;
+        return wcsicmp( a, b ) == 0;
     case COND_INE:
-        return strcmpiW( a, b ) != 0;
+        return wcsicmp( a, b ) != 0;
     case COND_IGE:
-        return strcmpiW( a, b ) >= 0;
+        return wcsicmp( a, b ) >= 0;
     case COND_ILE:
-        return strcmpiW( a, b ) <= 0;
+        return wcsicmp( a, b ) <= 0;
     default:
         ERR("invalid string operator\n");
         return 0;
@@ -619,7 +617,7 @@ static int COND_GetOperator( COND_input *cond )
     while ( 1 )
     {
         len = lstrlenW( table[i].str );
-        if ( !len || 0 == strncmpW( table[i].str, p, len ) )
+        if ( !len || 0 == wcsncmp( table[i].str, p, len ) )
             break;
         i++;
     }
@@ -668,7 +666,7 @@ static int COND_GetOne( struct cond_str *str, COND_input *cond )
 
     if (ch == '"' )
     {
-        LPCWSTR p = strchrW( str->data + 1, '"' );
+        LPCWSTR p = wcschr( str->data + 1, '"' );
         if (!p) return COND_ERROR;
         len = p - str->data + 1;
         rc = COND_LITER;
@@ -688,18 +686,18 @@ static int COND_GetOne( struct cond_str *str, COND_input *cond )
 
         if ( len == 3 )
         {
-            if ( !strncmpiW( str->data, szNot, len ) )
+            if ( !wcsnicmp( str->data, szNot, len ) )
                 rc = COND_NOT;
-            else if( !strncmpiW( str->data, szAnd, len ) )
+            else if( !wcsnicmp( str->data, szAnd, len ) )
                 rc = COND_AND;
-            else if( !strncmpiW( str->data, szXor, len ) )
+            else if( !wcsnicmp( str->data, szXor, len ) )
                 rc = COND_XOR;
-            else if( !strncmpiW( str->data, szEqv, len ) )
+            else if( !wcsnicmp( str->data, szEqv, len ) )
                 rc = COND_EQV;
-            else if( !strncmpiW( str->data, szImp, len ) )
+            else if( !wcsnicmp( str->data, szImp, len ) )
                 rc = COND_IMP;
         }
-        else if( (len == 2) && !strncmpiW( str->data, szOr, len ) )
+        else if( (len == 2) && !wcsnicmp( str->data, szOr, len ) )
             rc = COND_OR;
     }
     else if( COND_IsNumber( ch ) )
diff --git a/dll/win32/msi/create.c b/dll/win32/msi/create.c
index 2777954aa7d..6133159dce6 100644
--- a/dll/win32/msi/create.c
+++ b/dll/win32/msi/create.c
@@ -24,7 +24,6 @@
 #include "winbase.h"
 #include "winerror.h"
 #include "wine/debug.h"
-#include "wine/unicode.h"
 #include "msi.h"
 #include "msiquery.h"
 #include "objbase.h"
@@ -152,7 +151,7 @@ static UINT check_columns( const column_info *col_info )
     /* check for two columns with the same name */
     for( c1 = col_info; c1; c1 = c1->next )
         for( c2 = c1->next; c2; c2 = c2->next )
-            if (!strcmpW( c1->column, c2->column ))
+            if (!wcscmp( c1->column, c2->column ))
                 return ERROR_BAD_QUERY_SYNTAX;
 
     return ERROR_SUCCESS;
diff --git a/dll/win32/msi/custom.c b/dll/win32/msi/custom.c
index 6da8ab1b3de..fc0246f2063 100644
--- a/dll/win32/msi/custom.c
+++ b/dll/win32/msi/custom.c
@@ -18,10 +18,6 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */
 
-#include "config.h"
-#include "wine/port.h"
-#include "wine/asm.h"
-
 #define COBJMACROS
 
 #include <stdarg.h>
@@ -36,6 +32,7 @@
 
 #include "msipriv.h"
 #include "winemsi_s.h"
+#include "wine/asm.h"
 #include "wine/heap.h"
 #include "wine/debug.h"
 #include "wine/unicode.h"
@@ -129,7 +126,7 @@ BOOL msi_action_is_unique( const MSIPACKAGE *package, const WCHAR *action )
 
     for (i = 0; i < package->unique_actions_count; i++)
     {
-        if (!strcmpW( package->unique_actions[i], action )) return TRUE;
+        if (!wcscmp( package->unique_actions[i], action )) return TRUE;
     }
     return FALSE;
 }
@@ -191,7 +188,7 @@ static LPWSTR msi_get_deferred_action(LPCWSTR action, LPCWSTR actiondata,
           lstrlenW(format) - 7;
     deferred = msi_alloc(len * sizeof(WCHAR));
 
-    sprintfW(deferred, format, actiondata, usersid, prodcode, action);
+    swprintf(deferred, len, format, actiondata, usersid, prodcode, action);
     return deferred;
 }
 
@@ -200,15 +197,15 @@ static void set_deferred_action_props( MSIPACKAGE *package, const WCHAR *deferre
     static const WCHAR sep[] = {'<','=','>',0};
     const WCHAR *end, *beg = deferred_data + 1;
 
-    end = strstrW(beg, sep);
+    end = wcsstr(beg, sep);
     msi_set_property( package->db, szCustomActionData, beg, end - beg );
     beg = end + 3;
 
-    end = strstrW(beg, sep);
+    end = wcsstr(beg, sep);
     msi_set_property( package->db, szUserSID, beg, end - beg );
     beg = end + 3;
 
-    end = strchrW(beg, ']');
+    end = wcschr(beg, ']');
     msi_set_property( package->db, szProductCode, beg, end - beg );
 }
 
@@ -229,7 +226,7 @@ WCHAR *msi_create_temp_file( MSIDATABASE *db )
         if (!(db->tempfolder = strdupW( tmp ))) return NULL;
     }
 
-    if ((ret = msi_alloc( (strlenW( db->tempfolder ) + 20) * sizeof(WCHAR) )))
+    if ((ret = msi_alloc( (lstrlenW( db->tempfolder ) + 20) * sizeof(WCHAR) )))
     {
         if (!GetTempFileNameW( db->tempfolder, szMsi, 0, ret ))
         {
@@ -299,7 +296,7 @@ static MSIBINARY *get_temp_binary(MSIPACKAGE *package, LPCWSTR source)
 
     LIST_FOR_EACH_ENTRY( binary, &package->binaries, MSIBINARY, entry )
     {
-        if (!strcmpW( binary->source, source ))
+        if (!wcscmp( binary->source, source ))
             return binary;
     }
 
@@ -536,7 +533,7 @@ UINT CDECL __wine_msi_call_dll_function(DWORD client_pid, const GUID *guid)
     {
         WCHAR endpoint[12];
 
-        sprintfW(endpoint, endpoint_fmtW, client_pid);
+        swprintf(endpoint, ARRAY_SIZE(endpoint), endpoint_fmtW, client_pid);
         status = RpcStringBindingComposeW(NULL, ncalrpcW, NULL, endpoint, NULL, &binding_str);
         if (status != RPC_S_OK)
         {
@@ -621,7 +618,8 @@ static DWORD custom_start_server(MSIPACKAGE *package, DWORD arch)
         (arch == SCS_64BIT_BINARY && package->custom_server_64_process))
         return ERROR_SUCCESS;
 
-    sprintfW(buffer, pipe_name, GetCurrentProcessId(), arch == SCS_32BIT_BINARY ? 32 : 64);
+    swprintf(buffer, ARRAY_SIZE(buffer), pipe_name,
+             GetCurrentProcessId(), arch == SCS_32BIT_BINARY ? 32 : 64);
     pipe = CreateNamedPipeW(buffer, PIPE_ACCESS_DUPLEX, 0, 1, sizeof(DWORD64),
         sizeof(GUID), 0, NULL);
     if (pipe == INVALID_HANDLE_VALUE)
@@ -634,8 +632,8 @@ static DWORD custom_start_server(MSIPACKAGE *package, DWORD arch)
         GetSystemWow64DirectoryW(path, MAX_PATH - ARRAY_SIZE(msiexecW));
     else
         GetSystemDirectoryW(path, MAX_PATH - ARRAY_SIZE(msiexecW));
-    strcatW(path, msiexecW);
-    sprintfW(cmdline, argsW, path, GetCurrentProcessId());
+    lstrcatW(path, msiexecW);
+    swprintf(cmdline, ARRAY_SIZE(cmdline), argsW, path, GetCurrentProcessId());
 
     if (wow64 && arch == SCS_64BIT_BINARY)
     {
@@ -760,7 +758,7 @@ static msi_custom_action_info *do_msidbCustomActionTypeDll(
     {
         WCHAR endpoint[12];
 
-        sprintfW(endpoint, endpoint_fmtW, GetCurrentProcessId());
+        swprintf(endpoint, ARRAY_SIZE(endpoint), endpoint_fmtW, GetCurrentProcessId());
         status = RpcServerUseProtseqEpW(ncalrpcW, RPC_C_PROTSEQ_MAX_REQS_DEFAULT,
             endpoint, NULL);
         if (status != RPC_S_OK)
@@ -839,14 +837,14 @@ static HANDLE execute_command( const WCHAR *app, WCHAR *arg, const WCHAR *dir )
             return INVALID_HANDLE_VALUE;
         }
 
-        if (arg) len_arg = strlenW( arg );
+        if (arg) len_arg = lstrlenW( arg );
         if (!(cmd = msi_alloc( (len_exe + len_arg + 4) * sizeof(WCHAR) )))
         {
             msi_free( exe );
             return INVALID_HANDLE_VALUE;
         }
         p = cmd;
-        if (strchrW( exe, ' ' ))
+        if (wcschr( exe, ' ' ))
         {
             *p++ = '\"';
             memcpy( p, exe, len_exe * sizeof(WCHAR) );
@@ -856,7 +854,7 @@ static HANDLE execute_command( const WCHAR *app, WCHAR *arg, const WCHAR *dir )
         }
         else
         {
-            strcpyW( p, exe );
+            lstrcpyW( p, exe );
             p += len_exe;
         }
         if (arg)
@@ -976,15 +974,15 @@ static UINT HANDLE_CustomType23( MSIPACKAGE *package, const WCHAR *source, const
     HANDLE handle;
 
     if (!(dir = msi_dup_property( package->db, szOriginalDatabase ))) return ERROR_OUTOFMEMORY;
-    if (!(p = strrchrW( dir, '\\' )) && !(p = strrchrW( dir, '/' )))
+    if (!(p = wcsrchr( dir, '\\' )) && !(p = wcsrchr( dir, '/' )))
     {
         msi_free( dir );
         return ERROR_FUNCTION_FAILED;
     }
     *p = 0;
     len_dir = p - dir;
-    len_src = strlenW( source );
-    len_tgt = strlenW( target );
+    len_src = lstrlenW( source );
+    len_tgt = lstrlenW( target );
     if (!(arg = msi_alloc( (len + len_dir + len_src + len_tgt + 5) * sizeof(WCHAR) )))
     {
         msi_free( dir );
@@ -999,7 +997,7 @@ static UINT HANDLE_CustomType23( MSIPACKAGE *package, const WCHAR *source, const
     len += len_src;
     arg[len++] = '"';
     arg[len++] = ' ';
-    strcpyW( arg + len, target );
+    lstrcpyW( arg + len, target );
 
     TRACE("installing %s concurrently\n", debugstr_w(source));
 
@@ -1332,7 +1330,7 @@ UINT ACTION_CustomAction(MSIPACKAGE *package, const WCHAR *action)
     int len;
 
     /* deferred action: [properties]Action */
-    if ((ptr = strrchrW(action, ']')))
+    if ((ptr = wcsrchr(action, ']')))
     {
         deferred_data = action;
         action = ptr + 1;
@@ -1431,7 +1429,7 @@ UINT ACTION_CustomAction(MSIPACKAGE *package, const WCHAR *action)
 
             len = deformat_string( package, target, &deformated );
             rc = msi_set_property( package->db, source, deformated, len );
-            if (rc == ERROR_SUCCESS && !strcmpW( source, szSourceDir ))
+            if (rc == ERROR_SUCCESS && !wcscmp( source, szSourceDir ))
                 msi_reset_source_folders( package );
             msi_free(deformated);
             break;
diff --git a/dll/win32/msi/database.c b/dll/win32/msi/database.c
index 11ed27d9f20..776fe53e163 100644
--- a/dll/win32/msi/database.c
+++ b/dll/win32/msi/database.c
@@ -28,7 +28,6 @@
 #include "winreg.h"
 #include "winnls.h"
 #include "wine/debug.h"
-#include "wine/unicode.h"
 #include "msi.h"
 #include "msiquery.h"
 #include "msipriv.h"
@@ -251,7 +250,7 @@ UINT MSI_OpenDatabaseW(LPCWSTR szDBPath, LPCWSTR szPersist, MSIDATABASE **pdb)
         goto end;
     }
 
-    if (!strchrW( save_path, '\\' ))
+    if (!wcschr( save_path, '\\' ))
     {
         GetCurrentDirectoryW( MAX_PATH, path );
         lstrcatW( path, szBackSlash );
@@ -456,7 +455,7 @@ static LPWSTR msi_build_createsql_prelude(LPWSTR table)
     if (!prelude)
         return NULL;
 
-    sprintfW(prelude, create_fmt, table);
+    swprintf(prelude, size, create_fmt, table);
     return prelude;
 }
 
@@ -492,7 +491,7 @@ static LPWSTR msi_build_createsql_columns(LPWSTR *columns_data, LPWSTR *types, D
             comma[0] = ',';
 
         ptr = &types[i][1];
-        len = atolW(ptr);
+        len = wcstol(ptr, NULL, 10);
         extra[0] = '\0';
 
         switch (types[i][0])
@@ -503,14 +502,14 @@ static LPWSTR msi_build_createsql_columns(LPWSTR *columns_data, LPWSTR *types, D
             case 'L':
                 lstrcatW(extra, localizable);
                 type = type_char;
-                sprintfW(size, size_fmt, ptr);
+                swprintf(size, ARRAY_SIZE(size), size_fmt, ptr);
                 break;
             case 's':
                 lstrcpyW(extra, type_notnull);
                 /* fall through */
             case 'S':
                 type = type_char;
-                sprintfW(size, size_fmt, ptr);
+                swprintf(size, ARRAY_SIZE(size), size_fmt, ptr);
                 break;
             case 'i':
                 lstrcpyW(extra, type_notnull);
@@ -539,7 +538,7 @@ static LPWSTR msi_build_createsql_columns(LPWSTR *columns_data, LPWSTR *types, D
                 return NULL;
         }
 
-        sprintfW(expanded, column_fmt, columns_data[i], type, size, extra, comma);
+        swprintf(expanded, ARRAY_SIZE(expanded), column_fmt, columns_data[i], type, size, extra, comma);
         sql_size += lstrlenW(expanded);
 
         p = msi_realloc(columns, sql_size * sizeof(WCHAR));
@@ -573,7 +572,7 @@ static LPWSTR msi_build_createsql_postlude(LPWSTR *primary_keys, DWORD num_keys)
 
     for (i = 0, ptr = keys; i < num_keys; i++)
     {
-        ptr += sprintfW(ptr, key_fmt, primary_keys[i]);
+        ptr += swprintf(ptr, size - (ptr - keys), key_fmt, primary_keys[i]);
     }
 
     /* remove final ', ' */
@@ -584,7 +583,7 @@ static LPWSTR msi_build_createsql_postlude(LPWSTR *primary_keys, DWORD num_keys)
     if (!postlude)
         goto done;
 
-    sprintfW(postlude, postlude_fmt, keys);
+    swprintf(postlude, size, postlude_fmt, keys);
 
 done:
     msi_free(keys);
@@ -644,7 +643,7 @@ static LPWSTR msi_import_stream_filename(LPCWSTR path, LPCWSTR name)
     lstrcpyW( fullname, path );
 
     /* chop off extension from path */
-    ptr = strrchrW(fullname, '.');
+    ptr = wcsrchr(fullname, '.');
     if (!ptr)
     {
         msi_free (fullname);
@@ -673,7 +672,7 @@ static UINT construct_record(DWORD num_columns, LPWSTR *types,
                 break;
             case 'I': case 'i':
                 if (*data[i])
-                    MSI_RecordSetInteger(*rec, i + 1, atoiW(data[i]));
+                    MSI_RecordSetInteger(*rec, i + 1, wcstol(data[i], NULL, 10));
                 break;
             case 'V': case 'v':
                 if (*data[i])
@@ -790,9 +789,9 @@ static UINT MSI_DatabaseImport(MSIDATABASE *db, LPCWSTR folder, LPCWSTR file)
     msi_parse_line( &ptr, &labels, &num_labels, &len );
 
     if (num_columns == 1 && !columns[0][0] && num_labels == 1 && !labels[0][0] &&
-        num_types == 2 && !strcmpW( types[1], forcecodepage ))
+        num_types == 2 && !wcscmp( types[1], forcecodepage ))
     {
-        r = msi_set_string_table_codepage( db->strings, atoiW( types[0] ) );
+        r = msi_set_string_table_codepage( db->strings, wcstol( types[0], NULL, 10 ) );
         goto done;
     }
 
@@ -824,7 +823,7 @@ static UINT MSI_DatabaseImport(MSIDATABASE *db, LPCWSTR folder, LPCWSTR file)
         records = temp_records;
     }
 
-    if (!strcmpW(labels[0], suminfo))
+    if (!wcscmp(labels[0], suminfo))
     {
         r = msi_add_suminfo( db, records, num_records, num_columns );
         if (r != ERROR_SUCCESS)
@@ -966,11 +965,11 @@ static UINT msi_export_stream( const WCHAR *folder, const WCHAR *table, MSIRECOR
     if (r != ERROR_SUCCESS)
         return r;
 
-    len = (sz + strlenW( folder ) + strlenW( table ) + ARRAY_SIZE( fmt ) + 1) * sizeof(WCHAR);
-    if (!(path = msi_alloc( len )))
+    len = sz + lstrlenW( folder ) + lstrlenW( table ) + ARRAY_SIZE( fmt ) + 1;
+    if (!(path = msi_alloc( len * sizeof(WCHAR) )))
         return ERROR_OUTOFMEMORY;
 
-    len = sprintfW( path, fmt, folder, table );
+    len = swprintf( path, len, fmt, folder, table );
     if (!CreateDirectoryW( path, NULL ) && GetLastError() != ERROR_ALREADY_EXISTS)
     {
         msi_free( path );
@@ -978,7 +977,7 @@ static UINT msi_export_stream( const WCHAR *folder, const WCHAR *table, MSIRECOR
     }
 
     path[len++] = '\\';
-    strcpyW( path + len, stream );
+    lstrcpyW( path + len, stream );
     file = CreateFileW( path, GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE,
                         NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL );
     msi_free( path );
@@ -1108,14 +1107,14 @@ static UINT MSI_DatabaseExport( MSIDATABASE *db, LPCWSTR table, LPCWSTR folder,
     if (handle == INVALID_HANDLE_VALUE)
         return ERROR_FUNCTION_FAILED;
 
-    if (!strcmpW( table, forcecodepage ))
+    if (!wcscmp( table, forcecodepage ))
     {
         UINT codepage = msi_get_string_table_codepage( db->strings );
         r = msi_export_forcecodepage( handle, codepage );
         goto done;
     }
 
-    if (!strcmpW( table, summaryinformation ))
+    if (!wcscmp( table, summaryinformation ))
     {
         r = msi_export_summaryinformation( db, handle );
         goto done;
@@ -1288,7 +1287,7 @@ static BOOL merge_type_match(LPCWSTR type1, LPCWSTR type2)
         ((type2[0] == 'L') || (type2[0] == 'S')))
         return TRUE;
 
-    return !strcmpW( type1, type2 );
+    return !wcscmp( type1, type2 );
 }
 
 static UINT merge_verify_colnames(MSIQUERY *dbview, MSIQUERY *mergeview)
@@ -1313,7 +1312,7 @@ static UINT merge_verify_colnames(MSIQUERY *dbview, MSIQUERY *mergeview)
         if (!MSI_RecordGetString(mergerec, i))
             break;
 
-        if (strcmpW( MSI_RecordGetString( dbrec, i ), MSI_RecordGetString( mergerec, i ) ))
+        if (wcscmp( MSI_RecordGetString( dbrec, i ), MSI_RecordGetString( mergerec, i ) ))
         {
             r = ERROR_DATATYPE_MISMATCH;
             goto done;
@@ -1379,7 +1378,7 @@ static UINT merge_verify_primary_keys(MSIDATABASE *db, MSIDATABASE *mergedb,
 
     for (i = 1; i <= count; i++)
     {
-        if (strcmpW( MSI_RecordGetString( dbrec, i ), MSI_RecordGetString( mergerec, i ) ))
+        if (wcscmp( MSI_RecordGetString( dbrec, i ), MSI_RecordGetString( mergerec, i ) ))
         {
             r = ERROR_DATATYPE_MISMATCH;
             goto done;
@@ -1407,7 +1406,7 @@ static LPWSTR get_key_value(MSIQUERY *view, LPCWSTR key, MSIRECORD *rec)
     do
     {
         str = msi_dup_record_field(colnames, ++i);
-        cmp = strcmpW( key, str );
+        cmp = wcscmp( key, str );
         msi_free(str);
     } while (cmp);
 
@@ -1497,7 +1496,7 @@ static LPWSTR create_diff_row_query(MSIDATABASE *merge, MSIQUERY *view,
             goto done;
         }
 
-        sprintfW(clause + oldsize - 1, setptr, key, val);
+        swprintf(clause + oldsize - 1, size - (oldsize - 1), setptr, key, val);
         msi_free(val);
     }
 
@@ -1506,7 +1505,7 @@ static LPWSTR create_diff_row_query(MSIDATABASE *merge, MSIQUERY *view,
     if (!query)
         goto done;
 
-    sprintfW(query, fmt, table, clause);
+    swprintf(query, size, fmt, table, clause);
 
 done:
     msi_free(clause);
diff --git a/dll/win32/msi/dialog.c b/dll/win32/msi/dialog.c
index d0a8c821fd7..f35ae6f2466 100644
--- a/dll/win32/msi/dialog.c
+++ b/dll/win32/msi/dialog.c
@@ -40,7 +40,6 @@
 #include "shellapi.h"
 
 #include "wine/debug.h"
-#include "wine/unicode.h"
 
 #include "msipriv.h"
 #include "msiserver.h"
@@ -204,7 +203,7 @@ static msi_control *msi_dialog_find_control( msi_dialog *dialog, LPCWSTR name )
     if( !dialog->hwnd )
         return NULL;
     LIST_FOR_EACH_ENTRY( control, &dialog->controls, msi_control, entry )
-        if( !strcmpW( control->name, name ) ) /* FIXME: case sensitive? */
+        if( !wcscmp( control->name, name ) ) /* FIXME: case sensitive? */
             return control;
     return NULL;
 }
@@ -218,7 +217,7 @@ static msi_control *msi_dialog_find_control_by_type( msi_dialog *dialog, LPCWSTR
     if( !dialog->hwnd )
         return NULL;
     LIST_FOR_EACH_ENTRY( control, &dialog->controls, msi_control, entry )
-        if( !strcmpW( control->type, type ) ) /* FIXME: case sensitive? */
+        if( !wcscmp( control->type, type ) ) /* FIXME: case sensitive? */
             return control;
     return NULL;
 }
@@ -278,7 +277,7 @@ static LPWSTR msi_dialog_get_style( LPCWSTR p, LPCWSTR *rest )
     if( !p )
         return NULL;
 
-    while ((first = strchrW( p, '{' )) && (q = strchrW( first + 1, '}' )))
+    while ((first = wcschr( p, '{' )) && (q = wcschr( first + 1, '}' )))
     {
         p = first + 1;
         if( *p != '\\' && *p != '&' )
@@ -315,8 +314,8 @@ static UINT msi_dialog_add_font( MSIRECORD *rec, LPVOID param )
 
     /* create a font and add it to the list */
     name = MSI_RecordGetString( rec, 1 );
-    font = msi_alloc( FIELD_OFFSET( msi_font, name[strlenW( name ) + 1] ));
-    strcpyW( font->name, name );
+    font = msi_alloc( FIELD_OFFSET( msi_font, name[lstrlenW( name ) + 1] ));
+    lstrcpyW( font->name, name );
     list_add_head( &dialog->fonts, &font->entry );
 
     font->color = MSI_RecordGetInteger( rec, 4 );
@@ -355,7 +354,7 @@ static msi_font *msi_dialog_find_font( msi_dialog *dialog, LPCWSTR name )
     msi_font *font = NULL;
 
     LIST_FOR_EACH_ENTRY( font, &dialog->fonts, msi_font, entry )
-        if( !strcmpW( font->name, name ) )  /* FIXME: case sensitive? */
+        if( !wcscmp( font->name, name ) )  /* FIXME: case sensitive? */
             break;
 
     return font;
@@ -420,11 +419,11 @@ static msi_control *dialog_create_window( msi_dialog *dialog, MSIRECORD *rec, DW
 
     style |= WS_CHILD;
 
-    control = msi_alloc( FIELD_OFFSET( msi_control, name[strlenW( name ) + 1] ));
+    control = msi_alloc( FIELD_OFFSET( msi_control, name[lstrlenW( name ) + 1] ));
     if (!control)
         return NULL;
 
-    strcpyW( control->name, name );
+    lstrcpyW( control->name, name );
     list_add_tail( &dialog->controls, &control->entry );
     control->handler = NULL;
     control->update = NULL;
@@ -557,7 +556,7 @@ static void msi_dialog_update_controls( msi_dialog *dialog, LPCWSTR property )
 
     LIST_FOR_EACH_ENTRY( control, &dialog->controls, msi_control, entry )
     {
-        if ( control->property && !strcmpW( control->property, property ) && control->update )
+        if ( control->property && !wcscmp( control->property, property ) && control->update )
             control->update( dialog, control );
     }
 }
@@ -576,7 +575,7 @@ static void msi_dialog_update_all_controls( msi_dialog *dialog )
 static void msi_dialog_set_property( MSIPACKAGE *package, LPCWSTR property, LPCWSTR value )
 {
     UINT r = msi_set_property( package->db, property, value, -1 );
-    if (r == ERROR_SUCCESS && !strcmpW( property, szSourceDir ))
+    if (r == ERROR_SUCCESS && !wcscmp( property, szSourceDir ))
         msi_reset_source_folders( package );
 }
 
@@ -614,7 +613,7 @@ static void dialog_handle_event( msi_dialog *dialog, const WCHAR *control,
     ctrl = msi_dialog_find_control( dialog, control );
     if (!ctrl)
         return;
-    if( !strcmpW( attribute, szText ) )
+    if( !wcscmp( attribute, szText ) )
     {
         const WCHAR *font_text, *text = NULL;
         WCHAR *font, *text_fmt = NULL;
@@ -631,7 +630,7 @@ static void dialog_handle_event( msi_dialog *dialog, const WCHAR *control,
         msi_free( text_fmt );
         msi_dialog_check_messages( NULL );
     }
-    else if( !strcmpW( attribute, szProgress ) )
+    else if( !wcscmp( attribute, szProgress ) )
     {
         DWORD func, val1, val2, units;
 
@@ -686,12 +685,12 @@ static void dialog_handle_event( msi_dialog *dialog, const WCHAR *control,
             break;
         }
     }
-    else if ( !strcmpW( attribute, szProperty ) )
+    else if ( !wcscmp( attribute, szProperty ) )
     {
         MSIFEATURE *feature = msi_seltree_get_selected_feature( ctrl );
         if (feature) msi_dialog_set_property( dialog->package, ctrl->property, feature->Directory );
     }
-    else if ( !strcmpW( attribute, szSelectionPath ) )
+    else if ( !wcscmp( attribute, szSelectionPath ) )
     {
         BOOL indirect = ctrl->attributes & msidbControlAttributesIndirect;
         LPWSTR path = msi_dialog_dup_property( dialog, ctrl->property, indirect );
@@ -716,9 +715,9 @@ static void event_subscribe( msi_dialog *dialog, const WCHAR *event, const WCHAR
     LIST_FOR_EACH_ENTRY( sub, &dialog->package->subscriptions, struct subscriber, entry )
     {
         if (sub->dialog == dialog &&
-            !strcmpiW( sub->event, event ) &&
-            !strcmpiW( sub->control, control ) &&
-            !strcmpiW( sub->attribute, attribute ))
+            !wcsicmp( sub->event, event ) &&
+            !wcsicmp( sub->control, control ) &&
+            !wcsicmp( sub->attribute, attribute ))
         {
             TRACE("already subscribed\n");
             return;
@@ -780,7 +779,7 @@ static msi_control *msi_dialog_add_control( msi_dialog *dialog,
     name = MSI_RecordGetString( rec, 2 );
     control_type = MSI_RecordGetString( rec, 3 );
     attributes = MSI_RecordGetInteger( rec, 8 );
-    if (strcmpW( control_type, szScrollableText )) text = MSI_RecordGetString( rec, 10 );
+    if (wcscmp( control_type, szScrollableText )) text = MSI_RecordGetString( rec, 10 );
 
     TRACE("%s, %s, %08x, %s, %08x\n", debugstr_w(szCls), debugstr_w(name),
           attributes, debugstr_w(text), style);
@@ -920,14 +919,14 @@ static UINT msi_dialog_set_property_event( msi_dialog *dialog, LPCWSTR event, LP
     LPWSTR p, prop, arg_fmt = NULL;
     UINT len;
 
-    len = strlenW( event );
+    len = lstrlenW( event );
     prop = msi_alloc( len * sizeof(WCHAR) );
-    strcpyW( prop, &event[1] );
-    p = strchrW( prop, ']' );
+    lstrcpyW( prop, &event[1] );
+    p = wcschr( prop, ']' );
     if (p && (p[1] == 0 || p[1] == ' '))
     {
         *p = 0;
-        if (strcmpW( szNullArg, arg ))
+        if (wcscmp( szNullArg, arg ))
             deformat_string( dialog->package, arg, &arg_fmt );
         msi_dialog_set_property( dialog->package, prop, arg_fmt );
         msi_dialog_update_controls( dialog, prop );
@@ -1180,11 +1179,11 @@ static UINT msi_dialog_line_control( msi_dialog *dialog, MSIRECORD *rec )
 
     dialog_map_events( dialog, name );
 
-    control = msi_alloc( FIELD_OFFSET(msi_control, name[strlenW( name ) + 1] ));
+    control = msi_alloc( FIELD_OFFSET(msi_control, name[lstrlenW( name ) + 1] ));
     if (!control)
         return ERROR_OUTOFMEMORY;
 
-    strcpyW( control->name, name );
+    lstrcpyW( control->name, name );
     list_add_head( &dialog->controls, &control->entry );
     control->handler = NULL;
     control->property = NULL;
@@ -1572,15 +1571,15 @@ static UINT msi_dialog_set_control_condition( MSIRECORD *rec, LPVOID param )
         TRACE("%s control %s\n", debugstr_w(action), debugstr_w(name));
 
         /* FIXME: case sensitive? */
-        if (!strcmpW( action, szHide ))
+        if (!wcscmp( action, szHide ))
             ShowWindow(control->hwnd, SW_HIDE);
-        else if (!strcmpW( action, szShow ))
+        else if (!wcscmp( action, szShow ))
             ShowWindow(control->hwnd, SW_SHOW);
-        else if (!strcmpW( action, szDisable ))
+        else if (!wcscmp( action, szDisable ))
             EnableWindow(control->hwnd, FALSE);
-        else if (!strcmpW( action, szEnable ))
+        else if (!wcscmp( action, szEnable ))
             EnableWindow(control->hwnd, TRUE);
-        else if (!strcmpW( action, szDefault ))
+        else if (!wcscmp( action, szDefault ))
             SetFocus(control->hwnd);
         else
             FIXME("Unhandled action %s\n", debugstr_w(action));
@@ -1653,7 +1652,7 @@ static void msi_dialog_combobox_update( msi_dialog *dialog, msi_control *control
     for (j = 0; j < info->num_items; j++)
     {
         tmp = (LPWSTR) SendMessageW( control->hwnd, CB_GETITEMDATA, j, 0 );
-        if (!strcmpW( value, tmp ))
+        if (!wcscmp( value, tmp ))
             break;
     }
 
@@ -1754,15 +1753,15 @@ static UINT msi_dialog_edit_control( msi_dialog *dialog, MSIRECORD *rec )
     text = MSI_RecordGetString( rec, 10 );
     if ( text )
     {
-        begin = strchrW( text, '{' );
-        end = strchrW( text, '}' );
+        begin = wcschr( text, '{' );
+        end = wcschr( text, '}' );
 
         if ( begin && end && end > begin &&
              begin[0] >= '0' && begin[0] <= '9' &&
              end - begin < MAX_NUM_DIGITS)
         {
             lstrcpynW( num, begin + 1, end - begin );
-            limit = atolW( num );
+            limit = wcstol( num, NULL, 10 );
 
             SendMessageW( control->hwnd, EM_SETLIMITTEXT, limit, 0 );
         }
@@ -1927,7 +1926,7 @@ msi_maskedit_set_text( struct msi_maskedit_info *info, LPCWSTR text )
     p = text;
     for( i = 0; i < info->num_groups; i++ )
     {
-        if( info->group[i].len < strlenW( p ) )
+        if( info->group[i].len < lstrlenW( p ) )
         {
             LPWSTR chunk = strdupW( p );
             chunk[ info->group[i].len ] = 0;
@@ -1958,7 +1957,7 @@ static struct msi_maskedit_info * msi_dialog_parse_groups( LPCWSTR mask )
     if( !info )
         return info;
 
-    p = strchrW(mask, '<');
+    p = wcschr(mask, '<');
     if( p )
         p++;
     else
@@ -2305,7 +2304,7 @@ static UINT msi_dialog_create_radiobutton( MSIRECORD *rec, LPVOID param )
         return ERROR_FUNCTION_FAILED;
     control->handler = msi_dialog_radiogroup_handler;
 
-    if (group->propval && !strcmpW( control->name, group->propval ))
+    if (group->propval && !wcscmp( control->name, group->propval ))
         SendMessageW(control->hwnd, BM_SETCHECK, BST_CHECKED, 0);
 
     prop = MSI_RecordGetString( rec, 1 );
@@ -2570,7 +2569,7 @@ msi_seltree_add_child_features( MSIPACKAGE *package, HWND hwnd,
 
     LIST_FOR_EACH_ENTRY( feature, &package->features, MSIFEATURE, entry )
     {
-        if ( parent && feature->Feature_Parent && strcmpW( parent, feature->Feature_Parent ))
+        if ( parent && feature->Feature_Parent && wcscmp( parent, feature->Feature_Parent ))
             continue;
         else if ( parent && !feature->Feature_Parent )
             continue;
@@ -2994,7 +2993,7 @@ static void msi_dialog_update_directory_list( msi_dialog *dialog, msi_control *c
         if ( wfd.dwFileAttributes != FILE_ATTRIBUTE_DIRECTORY )
             continue;
 
-        if ( !strcmpW( wfd.cFileName, szDot ) || !strcmpW( wfd.cFileName, szDotDot ) )
+        if ( !wcscmp( wfd.cFileName, szDot ) || !wcscmp( wfd.cFileName, szDotDot ) )
             continue;
 
         item.mask = LVIF_TEXT;
@@ -3045,10 +3044,10 @@ static WCHAR *get_unique_folder_name( const WCHAR *root, int *ret_len )
     int len, count = 2;
 
     len = LoadStringW( msi_hInstance, IDS_NEWFOLDER, newfolder, ARRAY_SIZE(newfolder) );
-    len += strlenW(root) + 1;
+    len += lstrlenW(root) + 1;
     if (!(path = msi_alloc( (len + 4) * sizeof(WCHAR) ))) return NULL;
-    strcpyW( path, root );
-    strcatW( path, newfolder );
+    lstrcpyW( path, root );
+    lstrcatW( path, newfolder );
 
     for (;;)
     {
@@ -3058,11 +3057,11 @@ static WCHAR *get_unique_folder_name( const WCHAR *root, int *ret_len )
             msi_free( path );
             return NULL;
         }
-        len = sprintfW( path, fmtW, root, newfolder, count++ ) + 1;
+        swprintf( path, len + 4, fmtW, root, newfolder, count++ );
     }
 
-    ptr = strrchrW( path, '\\' ) + 1;
-    *ret_len = len - (ptr - path);
+    ptr = wcsrchr( path, '\\' ) + 1;
+    *ret_len = lstrlenW(ptr);
     memmove( path, ptr, *ret_len * sizeof(WCHAR) );
     return path;
 }
@@ -3133,7 +3132,7 @@ static UINT msi_dialog_dirlist_handler( msi_dialog *dialog, msi_control *control
     prop = msi_dialog_dup_property( dialog, control->property, indirect );
     path = msi_dialog_dup_property( dialog, prop, TRUE );
 
-    if (!(new_path = msi_alloc( (strlenW(path) + strlenW(text) + 2) * sizeof(WCHAR) )))
+    if (!(new_path = msi_alloc( (lstrlenW(path) + lstrlenW(text) + 2) * sizeof(WCHAR) )))
     {
         msi_free( prop );
         msi_free( path );
@@ -3191,7 +3190,7 @@ static BOOL str_is_number( LPCWSTR str )
     int i;
 
     for (i = 0; i < lstrlenW( str ); i++)
-        if (!isdigitW(str[i]))
+        if (!iswdigit(str[i]))
             return FALSE;
 
     return TRUE;
@@ -3218,9 +3217,9 @@ static void msi_dialog_vcl_add_columns( msi_dialog *dialog, msi_control *control
 
     if (!text) return;
 
-    while ((begin = strchrW( begin, '{' )) && count < 5)
+    while ((begin = wcschr( begin, '{' )) && count < 5)
     {
-        if (!(end = strchrW( begin, '}' )))
+        if (!(end = wcschr( begin, '}' )))
             return;
 
         num = msi_alloc( (end-begin+1)*sizeof(WCHAR) );
@@ -3231,7 +3230,7 @@ static void msi_dialog_vcl_add_columns( msi_dialog *dialog, msi_control *control
         begin += end - begin + 1;
 
         /* empty braces or '0' hides the column */ 
-        if ( !num[0] || !strcmpW( num, szZero ) )
+        if ( !num[0] || !wcscmp( num, szZero ) )
         {
             count++;
             msi_free( num );
@@ -3241,14 +3240,14 @@ static void msi_dialog_vcl_add_columns( msi_dialog *dialog, msi_control *control
         /* the width must be a positive number
          * if a width is invalid, all remaining columns are hidden
          */
-        if ( !strncmpW( num, negative, 1 ) || !str_is_number( num ) ) {
+        if ( !wcsncmp( num, negative, 1 ) || !str_is_number( num ) ) {
             msi_free( num );
             return;
         }
 
         ZeroMemory( &lvc, sizeof(lvc) );
         lvc.mask = LVCF_TEXT | LVCF_WIDTH | LVCF_SUBITEM;
-        lvc.cx = atolW( num );
+        lvc.cx = wcstol( num, NULL, 10 );
         lvc.pszText = msi_dialog_get_uitext( dialog, column_keys[count] );
 
         SendMessageW( control->hwnd,  LVM_INSERTCOLUMNW, count++, (LPARAM)&lvc );
@@ -3467,16 +3466,16 @@ static UINT msi_dialog_hyperlink_handler( msi_dialog *dialog, msi_control *contr
     p = item.szUrl;
     while (*p && *p != '<') p++;
     if (!*p++) return ERROR_SUCCESS;
-    if (toupperW( *p++ ) != 'A' || !isspaceW( *p++ )) return ERROR_SUCCESS;
-    while (*p && isspaceW( *p )) p++;
+    if (towupper( *p++ ) != 'A' || !iswspace( *p++ )) return ERROR_SUCCESS;
+    while (*p && iswspace( *p )) p++;
 
-    len = strlenW( p );
-    if (len > len_href && !strncmpiW( p, hrefW, len_href ))
+    len = lstrlenW( p );
+    if (len > len_href && !wcsnicmp( p, hrefW, len_href ))
     {
         p += len_href;
-        while (*p && isspaceW( *p )) p++;
+        while (*p && iswspace( *p )) p++;
         if (!*p || *p++ != '=') return ERROR_SUCCESS;
-        while (*p && isspaceW( *p )) p++;
+        while (*p && iswspace( *p )) p++;
 
         if (*p == '\"' || *p == '\'') quote = *p++;
         q = p;
@@ -3487,7 +3486,7 @@ static UINT msi_dialog_hyperlink_handler( msi_dialog *dialog, msi_control *contr
         }
         else
         {
-            while (*q && *q != '>' && !isspaceW( *q )) q++;
+            while (*q && *q != '>' && !iswspace( *q )) q++;
             if (!*q) return ERROR_SUCCESS;
         }
         item.szUrl[q - item.szUrl] = 0;
@@ -3501,7 +3500,7 @@ static UINT msi_dialog_hyperlink( msi_dialog *dialog, MSIRECORD *rec )
     msi_control *control;
     DWORD style = WS_CHILD | WS_TABSTOP | WS_GROUP;
     const WCHAR *text = MSI_RecordGetString( rec, 10 );
-    int len = strlenW( text );
+    int len = lstrlenW( text );
     LITEM item;
 
     control = msi_dialog_add_control( dialog, rec, WC_LINK, style );
@@ -3515,7 +3514,7 @@ static UINT msi_dialog_hyperlink( msi_dialog *dialog, MSIRECORD *rec )
     item.iLink     = 0;
     item.state     = LIS_ENABLED;
     item.stateMask = LIS_ENABLED;
-    if (len < L_MAX_URL_LENGTH) strcpyW( item.szUrl, text );
+    if (len < L_MAX_URL_LENGTH) lstrcpyW( item.szUrl, text );
     else item.szUrl[0] = 0;
 
     SendMessageW( control->hwnd, LM_SETITEM, 0, (LPARAM)&item );
@@ -3557,7 +3556,7 @@ static UINT msi_dialog_create_controls( MSIRECORD *rec, LPVOID param )
     /* find and call the function that can create this type of control */
     control_type = MSI_RecordGetString( rec, 3 );
     for( i = 0; i < ARRAY_SIZE( msi_dialog_handler ); i++ )
-        if (!strcmpiW( msi_dialog_handler[i].control_type, control_type ))
+        if (!wcsicmp( msi_dialog_handler[i].control_type, control_type ))
             break;
     if( i != ARRAY_SIZE( msi_dialog_handler  ))
         msi_dialog_handler[i].func( dialog, rec );
@@ -3615,7 +3614,7 @@ static INT msi_dialog_get_sans_serif_height( HWND hwnd )
     {
         memset( &lf, 0, sizeof lf );
         lf.lfHeight = MulDiv(12, GetDeviceCaps(hdc, LOGPIXELSY), 72);
-        strcpyW( lf.lfFaceName, szSansSerif );
+        lstrcpyW( lf.lfFaceName, szSansSerif );
         hFont = CreateFontIndirectW(&lf);
         if (hFont)
         {
@@ -4013,10 +4012,10 @@ static msi_dialog *dialog_create( MSIPACKAGE *package, const WCHAR *name, msi_di
     if (!hMsiHiddenWindow) dialog_register_class();
 
     /* allocate the structure for the dialog to use */
-    dialog = msi_alloc_zero( FIELD_OFFSET( msi_dialog, name[strlenW( name ) + 1] ));
+    dialog = msi_alloc_zero( FIELD_OFFSET( msi_dialog, name[lstrlenW( name ) + 1] ));
     if( !dialog )
         return NULL;
-    strcpyW( dialog->name, name );
+    lstrcpyW( dialog->name, name );
     dialog->parent = parent;
     dialog->package = package;
     dialog->event_handler = event_handler;
@@ -4115,7 +4114,7 @@ static void event_cleanup_subscriptions( MSIPACKAGE *package, const WCHAR *dialo
     {
         struct subscriber *sub = LIST_ENTRY( item, struct subscriber, entry );
 
-        if (strcmpW( sub->dialog->name, dialog )) continue;
+        if (wcscmp( sub->dialog->name, dialog )) continue;
         list_remove( &sub->entry );
         free_subscriber( sub );
     }
@@ -4359,13 +4358,13 @@ static UINT event_end_dialog( msi_dialog *dialog, const WCHAR *argument )
     static const WCHAR ignoreW[] = {'I','g','n','o','r','e',0};
     static const WCHAR returnW[] = {'R','e','t','u','r','n',0};
 
-    if (!strcmpW( argument, exitW ))
+    if (!wcscmp( argument, exitW ))
         dialog->retval = IDCANCEL;
-    else if (!strcmpW( argument, retryW ))
+    else if (!wcscmp( argument, retryW ))
         dialog->retval = IDRETRY;
-    else if (!strcmpW( argument, ignoreW ))
+    else if (!wcscmp( argument, ignoreW ))
         dialog->retval = IDOK;
-    else if (!strcmpW( argument, returnW ))
+    else if (!wcscmp( argument, returnW ))
         dialog->retval = 0;
     else
     {
@@ -4447,7 +4446,7 @@ static UINT event_add_local( msi_dialog *dialog, const WCHAR *argument )
 
     LIST_FOR_EACH_ENTRY( feature, &dialog->package->features, MSIFEATURE, entry )
     {
-        if (!strcmpW( argument, feature->Feature ) || !strcmpW( argument, szAll ))
+        if (!wcscmp( argument, feature->Feature ) || !wcscmp( argument, szAll ))
         {
             if (feature->ActionRequest != INSTALLSTATE_LOCAL)
                 msi_set_property( dialog->package->db, szPreselected, szOne, -1 );
@@ -4463,7 +4462,7 @@ static UINT event_remove( msi_dialog *dialog, const WCHAR *argument )
 
     LIST_FOR_EACH_ENTRY( feature, &dialog->package->features, MSIFEATURE, entry )
     {
-        if (!strcmpW( argument, feature->Feature ) || !strcmpW( argument, szAll ))
+        if (!wcscmp( argument, feature->Feature ) || !wcscmp( argument, szAll ))
         {
             if (feature->ActionRequest != INSTALLSTATE_ABSENT)
                 msi_set_property( dialog->package->db, szPreselected, szOne, -1 );
@@ -4479,7 +4478,7 @@ static UINT event_add_source( msi_dialog *dialog, const WCHAR *argument )
 
     LIST_FOR_EACH_ENTRY( feature, &dialog->package->features, MSIFEATURE, entry )
     {
-        if (!strcmpW( argument, feature->Feature ) || !strcmpW( argument, szAll ))
+        if (!wcscmp( argument, feature->Feature ) || !wcscmp( argument, szAll ))
         {
             if (feature->ActionRequest != INSTALLSTATE_SOURCE)
                 msi_set_property( dialog->package->db, szPreselected, szOne, -1 );
@@ -4497,7 +4496,7 @@ void msi_event_fire( MSIPACKAGE *package, const WCHAR *event, MSIRECORD *rec )
 
     LIST_FOR_EACH_ENTRY( sub, &package->subscriptions, struct subscriber, entry )
     {
-        if (strcmpiW( sub->event, event )) continue;
+        if (wcsicmp( sub->event, event )) continue;
         dialog_handle_event( sub->dialog, sub->control, sub->attribute, rec );
     }
 }
@@ -4581,7 +4580,7 @@ INT ACTION_DialogBox( MSIPACKAGE *package, const WCHAR *dialog )
 
 static UINT event_set_install_level( msi_dialog *dialog, const WCHAR *argument )
 {
-    int level = atolW( argument );
+    int level = wcstol( argument, NULL, 10 );
 
     TRACE("setting install level to %d\n", level);
     return MSI_SetInstallLevel( dialog->package, level );
@@ -4662,7 +4661,7 @@ static UINT dialog_event_handler( msi_dialog *dialog, const WCHAR *event, const
 
     for (i = 0; control_events[i].event; i++)
     {
-        if (!strcmpW( control_events[i].event, event ))
+        if (!wcscmp( control_events[i].event, event ))
             return control_events[i].handler( dialog, argument );
     }
     FIXME("unhandled event %s arg(%s)\n", debugstr_w(event), debugstr_w(argument));
diff --git a/dll/win32/msi/files.c b/dll/win32/msi/files.c
index 68b8954f57f..aba714b317d 100644
--- a/dll/win32/msi/files.c
+++ b/dll/win32/msi/files.c
@@ -45,7 +45,6 @@
 #include "shlwapi.h"
 #include "patchapi.h"
 #include "wine/debug.h"
-#include "wine/unicode.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(msi);
 
@@ -206,10 +205,10 @@ BOOL msi_create_full_path( MSIPACKAGE *package, const WCHAR *path )
     WCHAR *new_path;
     int len;
 
-    if (!(new_path = msi_alloc( (strlenW( path ) + 1) * sizeof(WCHAR) ))) return FALSE;
-    strcpyW( new_path, path );
+    if (!(new_path = msi_alloc( (lstrlenW( path ) + 1) * sizeof(WCHAR) ))) return FALSE;
+    lstrcpyW( new_path, path );
 
-    while ((len = strlenW( new_path )) && new_path[len - 1] == '\\')
+    while ((len = lstrlenW( new_path )) && new_path[len - 1] == '\\')
     new_path[len - 1] = 0;
 
     while (!msi_create_directory( package, new_path ))
@@ -222,7 +221,7 @@ BOOL msi_create_full_path( MSIPACKAGE *package, const WCHAR *path )
             ret = FALSE;
             break;
         }
-        if (!(slash = strrchrW( new_path, '\\' )))
+        if (!(slash = wcsrchr( new_path, '\\' )))
         {
             ret = FALSE;
             break;
@@ -436,8 +435,8 @@ static UINT copy_install_file(MSIPACKAGE *package, MSIFILE *file, LPWSTR source)
         TRACE("file in use, scheduling rename operation\n");
 
         if (!(pathW = strdupW( file->TargetPath ))) return ERROR_OUTOFMEMORY;
-        if ((p = strrchrW(pathW, '\\'))) *p = 0;
-        len = strlenW( pathW ) + 16;
+        if ((p = wcsrchr(pathW, '\\'))) *p = 0;
+        len = lstrlenW( pathW ) + 16;
         if (!(tmpfileW = msi_alloc(len * sizeof(WCHAR))))
         {
             msi_free( pathW );
@@ -490,7 +489,7 @@ static MSIFILE *find_file( MSIPACKAGE *package, UINT disk_id, const WCHAR *filen
     {
         if (file->disk_id == disk_id &&
             file->state != msifs_installed &&
-            !strcmpiW( filename, file->File )) return file;
+            !wcsicmp( filename, file->File )) return file;
     }
     return NULL;
 }
@@ -670,7 +669,7 @@ static MSIFILEPATCH *find_filepatch( MSIPACKAGE *package, UINT disk_id, const WC
 
     LIST_FOR_EACH_ENTRY( patch, &package->filepatches, MSIFILEPATCH, entry )
     {
-        if (!patch->extracted && patch->disk_id == disk_id && !strcmpW( key, patch->File->File ))
+        if (!patch->extracted && patch->disk_id == disk_id && !wcscmp( key, patch->File->File ))
             return patch;
     }
     return NULL;
@@ -923,7 +922,7 @@ static WCHAR *wildcard_to_file( const WCHAR *wildcard, const WCHAR *filename )
     WCHAR *path;
     DWORD dirlen, pathlen;
 
-    ptr = strrchrW(wildcard, '\\');
+    ptr = wcsrchr(wildcard, '\\');
     dirlen = ptr - wildcard + 1;
 
     pathlen = dirlen + lstrlenW(filename) + 1;
@@ -964,8 +963,8 @@ static BOOL add_wildcard( FILE_LIST *files, const WCHAR *source, WCHAR *dest )
         return FALSE;
 
     new->source = strdupW(source);
-    ptr = strrchrW(dest, '\\') + 1;
-    filename = strrchrW(new->source, '\\') + 1;
+    ptr = wcsrchr(dest, '\\') + 1;
+    filename = wcsrchr(new->source, '\\') + 1;
 
     new->sourcename = filename;
 
@@ -993,7 +992,7 @@ static BOOL add_wildcard( FILE_LIST *files, const WCHAR *source, WCHAR *dest )
 
     LIST_FOR_EACH_ENTRY(file, &files->entry, FILE_LIST, entry)
     {
-        if (strcmpW( source, file->source ) < 0)
+        if (wcscmp( source, file->source ) < 0)
         {
             list_add_before(&file->entry, &new->entry);
             return TRUE;
@@ -1039,7 +1038,7 @@ static BOOL move_files_wildcard( MSIPACKAGE *package, const WCHAR *source, WCHAR
 
     /* only the first wildcard match gets renamed to dest */
     file = LIST_ENTRY(list_head(&files.entry), FILE_LIST, entry);
-    size = (strrchrW(file->dest, '\\') - file->dest) + lstrlenW(file->destname) + 2;
+    size = (wcsrchr(file->dest, '\\') - file->dest) + lstrlenW(file->destname) + 2;
     file->dest = msi_realloc(file->dest, size * sizeof(WCHAR));
     if (!file->dest)
     {
@@ -1048,11 +1047,11 @@ static BOOL move_files_wildcard( MSIPACKAGE *package, const WCHAR *source, WCHAR
     }
 
     /* file->dest may be shorter after the reallocation, so add a NULL
-     * terminator.  This is needed for the call to strrchrW, as there will no
+     * terminator.  This is needed for the call to wcsrchr, as there will no
      * longer be a NULL terminator within the bounds of the allocation in this case.
      */
     file->dest[size - 1] = '\0';
-    lstrcpyW(strrchrW(file->dest, '\\') + 1, file->destname);
+    lstrcpyW(wcsrchr(file->dest, '\\') + 1, file->destname);
 
     while (!list_empty(&files.entry))
     {
@@ -1074,8 +1073,8 @@ done:
 
 void msi_reduce_to_long_filename( WCHAR *filename )
 {
-    WCHAR *p = strchrW( filename, '|' );
-    if (p) memmove( filename, p + 1, (strlenW( p + 1 ) + 1) * sizeof(WCHAR) );
+    WCHAR *p = wcschr( filename, '|' );
+    if (p) memmove( filename, p + 1, (lstrlenW( p + 1 ) + 1) * sizeof(WCHAR) );
 }
 
 static UINT ITERATE_MoveFiles( MSIRECORD *rec, LPVOID param )
@@ -1134,7 +1133,7 @@ static UINT ITERATE_MoveFiles( MSIRECORD *rec, LPVOID param )
         lstrcatW(source, sourcename);
     }
 
-    wildcards = strchrW(source, '*') || strchrW(source, '?');
+    wildcards = wcschr(source, '*') || wcschr(source, '?');
 
     if (MSI_RecordIsNull(rec, 4))
     {
@@ -1143,7 +1142,7 @@ static UINT ITERATE_MoveFiles( MSIRECORD *rec, LPVOID param )
             WCHAR *p;
             if (sourcename)
                 destname = strdupW(sourcename);
-            else if ((p = strrchrW(sourcedir, '\\')))
+            else if ((p = wcsrchr(sourcedir, '\\')))
                 destname = strdupW(p + 1);
             else
                 destname = strdupW(sourcedir);
@@ -1231,9 +1230,9 @@ static WCHAR *get_duplicate_filename( MSIPACKAGE *package, MSIRECORD *row, const
 
     if (MSI_RecordIsNull( row, 4 ))
     {
-        len = strlenW( src ) + 1;
+        len = lstrlenW( src ) + 1;
         if (!(dst_name = msi_alloc( len * sizeof(WCHAR)))) return NULL;
-        strcpyW( dst_name, strrchrW( src, '\\' ) + 1 );
+        lstrcpyW( dst_name, wcsrchr( src, '\\' ) + 1 );
     }
     else
     {
@@ -1247,7 +1246,7 @@ static WCHAR *get_duplicate_filename( MSIPACKAGE *package, MSIRECORD *row, const
     {
         WCHAR *p;
         dst_path = strdupW( src );
-        p = strrchrW( dst_path, '\\' );
+        p = wcsrchr( dst_path, '\\' );
         if (p) *p = 0;
     }
     else
diff --git a/dll/win32/msi/font.c b/dll/win32/msi/font.c
index 08dcc149579..f26d3fd99c3 100644
--- a/dll/win32/msi/font.c
+++ b/dll/win32/msi/font.c
@@ -25,7 +25,6 @@
 #include "winreg.h"
 #include "wine/debug.h"
 #include "msipriv.h"
-#include "wine/unicode.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(msi);
 
@@ -190,9 +189,9 @@ static WCHAR *font_name_from_file( MSIPACKAGE *package, const WCHAR *filename )
             msi_free( name );
             return NULL;
         }
-        ret = msi_alloc( (strlenW( name ) + strlenW( truetypeW ) + 1 ) * sizeof(WCHAR) );
-        strcpyW( ret, name );
-        strcatW( ret, truetypeW );
+        ret = msi_alloc( (lstrlenW( name ) + lstrlenW( truetypeW ) + 1 ) * sizeof(WCHAR) );
+        lstrcpyW( ret, name );
+        lstrcatW( ret, truetypeW );
         msi_free( name );
     }
     return ret;
@@ -206,20 +205,20 @@ WCHAR *msi_get_font_file_version( MSIPACKAGE *package, const WCHAR *filename )
     if ((version = load_ttf_name_id( package, filename, NAME_ID_VERSION )))
     {
         int len, major = 0, minor = 0;
-        if ((p = strchrW( version, ';' ))) *p = 0;
+        if ((p = wcschr( version, ';' ))) *p = 0;
         p = version;
-        while (*p && !isdigitW( *p )) p++;
-        if ((q = strchrW( p, '.' )))
+        while (*p && !iswdigit( *p )) p++;
+        if ((q = wcschr( p, '.' )))
         {
-            major = atoiW( p );
+            major = wcstol( p, NULL, 10 );
             p = ++q;
-            while (*q && isdigitW( *q )) q++;
-            if (!*q || *q == ' ') minor = atoiW( p );
+            while (*q && iswdigit( *q )) q++;
+            if (!*q || *q == ' ') minor = wcstol( p, NULL, 10 );
             else major = 0;
         }
-        len = strlenW( fmtW ) + 20;
+        len = lstrlenW( fmtW ) + 20;
         ret = msi_alloc( len * sizeof(WCHAR) );
-        sprintfW( ret, fmtW, major, minor );
+        swprintf( ret, len, fmtW, major, minor );
         msi_free( version );
     }
     return ret;
@@ -277,7 +276,7 @@ static UINT ITERATE_RegisterFonts(MSIRECORD *row, LPVOID param)
     /* the UI chunk */
     uirow = MSI_CreateRecord( 1 );
     uipath = strdupW( file->TargetPath );
-    p = strrchrW(uipath,'\\');
+    p = wcsrchr(uipath,'\\');
     if (p) p++;
     else p = uipath;
     MSI_RecordSetStringW( uirow, 1, p );
@@ -360,7 +359,7 @@ static UINT ITERATE_UnregisterFonts( MSIRECORD *row, LPVOID param )
     /* the UI chunk */
     uirow = MSI_CreateRecord( 1 );
     uipath = strdupW( file->TargetPath );
-    p = strrchrW( uipath,'\\' );
+    p = wcsrchr( uipath,'\\' );
     if (p) p++;
     else p = uipath;
     MSI_RecordSetStringW( uirow, 1, p );
diff --git a/dll/win32/msi/format.c b/dll/win32/msi/format.c
index deda22595f0..340f5d5657f 100644
--- a/dll/win32/msi/format.c
+++ b/dll/win32/msi/format.c
@@ -36,7 +36,6 @@
 #include "msipriv.h"
 #include "winemsi_s.h"
 #include "wine/exception.h"
-#include "wine/unicode.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(msi);
 
@@ -163,7 +162,7 @@ static WCHAR *deformat_index( FORMAT *format, FORMSTR *str, int *ret_len )
 
     if (!(val = msi_alloc( (str->len + 1) * sizeof(WCHAR) ))) return NULL;
     lstrcpynW(val, get_formstr_data(format, str), str->len + 1);
-    field = atoiW( val );
+    field = wcstol( val, NULL, 10 );
     msi_free( val );
 
     if (MSI_RecordIsNull( format->record, field ) ||
@@ -222,7 +221,7 @@ static WCHAR *deformat_component( FORMAT *format, FORMSTR *str, int *ret_len )
     else
         ret = strdupW( msi_get_target_folder( format->package, comp->Directory ) );
 
-    if (ret) *ret_len = strlenW( ret );
+    if (ret) *ret_len = lstrlenW( ret );
     else *ret_len = 0;
     msi_free( key );
     return ret;
@@ -240,12 +239,12 @@ static WCHAR *deformat_file( FORMAT *format, FORMSTR *str, BOOL shortname, int *
     if (!(file = msi_get_loaded_file( format->package, key ))) goto done;
     if (!shortname)
     {
-        if ((ret = strdupW( file->TargetPath ))) len = strlenW( ret );
+        if ((ret = strdupW( file->TargetPath ))) len = lstrlenW( ret );
         goto done;
     }
     if (!(len = GetShortPathNameW(file->TargetPath, NULL, 0)))
     {
-        if ((ret = strdupW( file->TargetPath ))) len = strlenW( ret );
+        if ((ret = strdupW( file->TargetPath ))) len = lstrlenW( ret );
         goto done;
     }
     len++;
@@ -352,14 +351,14 @@ static WCHAR *build_default_format( const MSIRECORD *record )
 
     for (i = 1; i <= count; i++)
     {
-        size += sprintfW( buf, fmt, i, i );
+        size += swprintf( buf, ARRAY_SIZE(buf), fmt, i, i );
         if (!(tmp = msi_realloc( ret, size * sizeof(*ret) )))
         {
             msi_free( ret );
             return NULL;
         }
         ret = tmp;
-        strcatW( ret, buf );
+        lstrcatW( ret, buf );
     }
     return ret;
 }
diff --git a/dll/win32/msi/insert.c b/dll/win32/msi/insert.c
index f1185eebaeb..098287d6039 100644
--- a/dll/win32/msi/insert.c
+++ b/dll/win32/msi/insert.c
@@ -24,7 +24,6 @@
 #include "winbase.h"
 #include "winerror.h"
 #include "wine/debug.h"
-#include "wine/unicode.h"
 #include "msi.h"
 #include "msiquery.h"
 #include "objbase.h"
@@ -117,7 +116,7 @@ static BOOL msi_columns_in_order(MSIINSERTVIEW *iv, UINT col_count)
         iv->sv->ops->get_column_info(iv->sv, i, &a, NULL, NULL, NULL);
         iv->table->ops->get_column_info(iv->table, i, &b, NULL, NULL, NULL);
 
-        if (strcmpW( a, b )) return FALSE;
+        if (wcscmp( a, b )) return FALSE;
     }
     return TRUE;
 }
@@ -161,7 +160,7 @@ static UINT msi_arrange_record(MSIINSERTVIEW *iv, MSIRECORD **values)
             if (r != ERROR_SUCCESS)
                 goto err;
 
-            if (!strcmpW( a, b ))
+            if (!wcscmp( a, b ))
             {
                 MSI_RecordCopyField(*values, colidx, padded, i);
                 break;
diff --git a/dll/win32/msi/install.c b/dll/win32/msi/install.c
index 5356451e294..ebacd9a6130 100644
--- a/dll/win32/msi/install.c
+++ b/dll/win32/msi/install.c
@@ -37,7 +37,6 @@
 #include "wine/heap.h"
 #include "wine/debug.h"
 #include "wine/exception.h"
-#include "wine/unicode.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(msi);
 
@@ -166,7 +165,7 @@ UINT msi_strcpy_to_awstring( const WCHAR *str, int len, awstring *awbuf, DWORD *
     if (!sz)
         return ERROR_SUCCESS;
 
-    if (len < 0) len = strlenW( str );
+    if (len < 0) len = lstrlenW( str );
  
     if (awbuf->unicode && awbuf->str.w)
     {
@@ -197,7 +196,7 @@ UINT msi_strncpyWtoA(const WCHAR *str, int lenW, char *buf, DWORD *sz, BOOL remo
     if (!sz)
         return buf ? ERROR_INVALID_PARAMETER : ERROR_SUCCESS;
 
-    if (lenW < 0) lenW = strlenW(str);
+    if (lenW < 0) lenW = lstrlenW(str);
     lenA = WideCharToMultiByte(CP_ACP, 0, str, lenW + 1, NULL, 0, NULL, NULL);
     WideCharToMultiByte(CP_ACP, 0, str, lenW + 1, buf, *sz, NULL, NULL);
     lenA--;
@@ -219,7 +218,7 @@ UINT msi_strncpyW(const WCHAR *str, int len, WCHAR *buf, DWORD *sz)
     if (!sz)
         return buf ? ERROR_INVALID_PARAMETER : ERROR_SUCCESS;
 
-    if (len < 0) len = strlenW(str);
+    if (len < 0) len = lstrlenW(str);
     if (buf)
         memcpy(buf, str, min(len + 1, *sz) * sizeof(WCHAR));
     if (buf && len >= *sz)
@@ -239,7 +238,7 @@ const WCHAR *msi_get_target_folder( MSIPACKAGE *package, const WCHAR *name )
     if (!folder->ResolvedTarget)
     {
         MSIFOLDER *parent = folder;
-        while (parent->Parent && strcmpW( parent->Parent, parent->Directory ))
+        while (parent->Parent && wcscmp( parent->Parent, parent->Directory ))
         {
             parent = msi_get_loaded_folder( package, parent->Parent );
         }
@@ -370,11 +369,11 @@ WCHAR *msi_resolve_source_folder( MSIPACKAGE *package, const WCHAR *name, MSIFOL
 
     TRACE("working to resolve %s\n", debugstr_w(name));
 
-    if (!strcmpW( name, szSourceDir )) name = szTargetDir;
+    if (!wcscmp( name, szSourceDir )) name = szTargetDir;
     if (!(f = msi_get_loaded_folder( package, name ))) return NULL;
 
     /* special resolving for root dir */
-    if (!strcmpW( name, szTargetDir ) && !f->ResolvedSource)
+    if (!wcscmp( name, szTargetDir ) && !f->ResolvedSource)
     {
         f->ResolvedSource = get_source_root( package );
     }
@@ -548,7 +547,7 @@ static void set_target_path( MSIPACKAGE *package, MSIFOLDER *folder, const WCHAR
     WCHAR *target_path;
 
     if (!(target_path = msi_normalize_path( path ))) return;
-    if (strcmpW( target_path, folder->ResolvedTarget ))
+    if (wcscmp( target_path, folder->ResolvedTarget ))
     {
         msi_free( folder->ResolvedTarget );
         folder->ResolvedTarget = target_path;
@@ -936,7 +935,7 @@ UINT MSI_SetFeatureStateW( MSIPACKAGE *package, LPCWSTR szFeature, INSTALLSTATE
     /* update all the features that are children of this feature */
     LIST_FOR_EACH_ENTRY( child, &package->features, MSIFEATURE, entry )
     {
-        if (child->Feature_Parent && !strcmpW( szFeature, child->Feature_Parent ))
+        if (child->Feature_Parent && !wcscmp( szFeature, child->Feature_Parent ))
             MSI_SetFeatureStateW(package, child->Feature, iState);
     }
     
@@ -1031,7 +1030,7 @@ UINT WINAPI MsiSetFeatureAttributesW( MSIHANDLE handle, LPCWSTR name, DWORD attr
         return ERROR_INVALID_HANDLE;
 
     costing = msi_dup_property( package->db, szCostingComplete );
-    if (!costing || !strcmpW( costing, szOne ))
+    if (!costing || !wcscmp( costing, szOne ))
     {
         msi_free( costing );
         msiobj_release( &package->hdr );
@@ -1318,7 +1317,7 @@ static UINT MSI_GetFeatureInfo( MSIPACKAGE *package, LPCWSTR name, LPDWORD attrs
     if (attrs) *attrs = map_feature_attributes( feature->Attributes );
     if (title_len)
     {
-        if (feature->Title) len = strlenW( feature->Title );
+        if (feature->Title) len = lstrlenW( feature->Title );
         else len = 0;
         if (*title_len <= len)
         {
@@ -1327,14 +1326,14 @@ static UINT MSI_GetFeatureInfo( MSIPACKAGE *package, LPCWSTR name, LPDWORD attrs
         }
         else if (title)
         {
-            if (feature->Title) strcpyW( title, feature->Title );
+            if (feature->Title) lstrcpyW( title, feature->Title );
             else *title = 0;
             *title_len = len;
         }
     }
     if (help_len)
     {
-        if (feature->Description) len = strlenW( feature->Description );
+        if (feature->Description) len = lstrlenW( feature->Description );
         else len = 0;
         if (*help_len <= len)
         {
@@ -1343,7 +1342,7 @@ static UINT MSI_GetFeatureInfo( MSIPACKAGE *package, LPCWSTR name, LPDWORD attrs
         }
         else if (help)
         {
-            if (feature->Description) strcpyW( help, feature->Description );
+            if (feature->Description) lstrcpyW( help, feature->Description );
             else *help = 0;
             *help_len = len;
         }
@@ -1588,7 +1587,7 @@ UINT MSI_SetInstallLevel( MSIPACKAGE *package, int iInstallLevel )
     if (iInstallLevel < 1)
         return MSI_SetFeatureStates( package );
 
-    len = sprintfW( level, fmt, iInstallLevel );
+    len = swprintf( level, ARRAY_SIZE(level), fmt, iInstallLevel );
     r = msi_set_property( package->db, szInstallLevel, level, len );
     if ( r == ERROR_SUCCESS )
         r = MSI_SetFeatureStates( package );
diff --git a/dll/win32/msi/media.c b/dll/win32/msi/media.c
index e334c5b6eac..05a751092a3 100644
--- a/dll/win32/msi/media.c
+++ b/dll/win32/msi/media.c
@@ -31,7 +31,6 @@
 #include "winreg.h"
 #include "shlwapi.h"
 #include "objidl.h"
-#include "wine/unicode.h"
 #include "resource.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(msi);
@@ -59,7 +58,7 @@ static BOOL source_matches_volume(MSIMEDIAINFO *mi, LPCWSTR source_root)
     const WCHAR *p;
     int len, len2;
 
-    strcpyW(root, source_root);
+    lstrcpyW(root, source_root);
     PathStripToRootW(root);
     PathAddBackslashW(root);
 
@@ -69,12 +68,12 @@ static BOOL source_matches_volume(MSIMEDIAINFO *mi, LPCWSTR source_root)
         return FALSE;
     }
 
-    len = strlenW( volume_name );
-    len2 = strlenW( mi->volume_label );
+    len = lstrlenW( volume_name );
+    len2 = lstrlenW( mi->volume_label );
     if (len2 > len) return FALSE;
     p = volume_name + len - len2;
 
-    return !strcmpiW( mi->volume_label, p );
+    return !wcsicmp( mi->volume_label, p );
 }
 
 static UINT msi_change_media(MSIPACKAGE *package, MSIMEDIAINFO *mi)
@@ -309,10 +308,10 @@ static WCHAR *get_cabinet_filename(MSIMEDIAINFO *mi)
     int len;
     WCHAR *ret;
 
-    len = strlenW(mi->sourcedir) + strlenW(mi->cabinet) + 1;
+    len = lstrlenW(mi->sourcedir) + lstrlenW(mi->cabinet) + 1;
     if (!(ret = msi_alloc(len * sizeof(WCHAR)))) return NULL;
-    strcpyW(ret, mi->sourcedir);
-    strcatW(ret, mi->cabinet);
+    lstrcpyW(ret, mi->sourcedir);
+    lstrcatW(ret, mi->cabinet);
     return ret;
 }
 
@@ -342,7 +341,7 @@ static INT_PTR cabinet_next_cabinet(FDINOTIFICATIONTYPE fdint,
         goto done;
     }
 
-    if (strcmpiW( mi->cabinet, cab ))
+    if (wcsicmp( mi->cabinet, cab ))
     {
         char *next_cab;
         ULONG length;
@@ -467,8 +466,8 @@ static INT_PTR cabinet_copy_file(FDINOTIFICATIONTYPE fdint,
             TRACE("file in use, scheduling rename operation\n");
 
             if (!(tmppathW = strdupW( path ))) return ERROR_OUTOFMEMORY;
-            if ((p = strrchrW(tmppathW, '\\'))) *p = 0;
-            len = strlenW( tmppathW ) + 16;
+            if ((p = wcsrchr(tmppathW, '\\'))) *p = 0;
+            len = lstrlenW( tmppathW ) + 16;
             if (!(tmpfileW = msi_alloc(len * sizeof(WCHAR))))
             {
                 msi_free( tmppathW );
@@ -671,7 +670,7 @@ static UINT get_drive_type(const WCHAR *path)
 {
     WCHAR root[MAX_PATH + 1];
 
-    strcpyW(root, path);
+    lstrcpyW(root, path);
     PathStripToRootW(root);
     PathAddBackslashW(root);
 
@@ -681,7 +680,7 @@ static UINT get_drive_type(const WCHAR *path)
 static WCHAR *get_base_url( MSIDATABASE *db )
 {
     WCHAR *p, *ret = NULL, *orig_db = msi_dup_property( db, szOriginalDatabase );
-    if (UrlIsW( orig_db, URLIS_URL ) && (ret = strdupW( orig_db )) && (p = strrchrW( ret, '/'))) p[1] = 0;
+    if (UrlIsW( orig_db, URLIS_URL ) && (ret = strdupW( orig_db )) && (p = wcsrchr( ret, '/'))) p[1] = 0;
     msi_free( orig_db );
     return ret;
 }
@@ -793,7 +792,7 @@ static UINT find_published_source(MSIPACKAGE *package, MSIMEDIAINFO *mi)
                                              MSISOURCETYPE_NETWORK, index++,
                                              volume, &volumesz) == ERROR_SUCCESS)
             {
-                if (check_all || !strncmpiW(source, volume, strlenW(source)))
+                if (check_all || !wcsnicmp(source, volume, lstrlenW(source)))
                 {
                     lstrcpyW(cabinet_file, volume);
                     PathAddBackslashW(cabinet_file);
@@ -832,11 +831,11 @@ static UINT find_published_source(MSIPACKAGE *package, MSIMEDIAINFO *mi)
         mi->disk_id = id;
         msi_free( mi->volume_label );
         if (!(mi->volume_label = msi_alloc( ++volumesz * sizeof(WCHAR) ))) return ERROR_OUTOFMEMORY;
-        strcpyW( mi->volume_label, volume );
+        lstrcpyW( mi->volume_label, volume );
 
         msi_free( mi->disk_prompt );
         if (!(mi->disk_prompt = msi_alloc( ++promptsz * sizeof(WCHAR) ))) return ERROR_OUTOFMEMORY;
-        strcpyW( mi->disk_prompt, prompt );
+        lstrcpyW( mi->disk_prompt, prompt );
 
         if (source_matches_volume(mi, source))
         {
@@ -875,20 +874,20 @@ UINT ready_media( MSIPACKAGE *package, BOOL compressed, MSIMEDIAINFO *mi )
             WCHAR temppath[MAX_PATH], *p, *url;
 
             msi_free( cabinet_file );
-            if (!(url = msi_alloc( (strlenW( base_url ) + strlenW( mi->cabinet ) + 1) * sizeof(WCHAR) )))
+            if (!(url = msi_alloc( (lstrlenW( base_url ) + lstrlenW( mi->cabinet ) + 1) * sizeof(WCHAR) )))
             {
                 return ERROR_OUTOFMEMORY;
             }
-            strcpyW( url, base_url );
-            strcatW( url, mi->cabinet );
+            lstrcpyW( url, base_url );
+            lstrcatW( url, mi->cabinet );
             if ((rc = msi_download_file( url, temppath )) != ERROR_SUCCESS)
             {
                 ERR("failed to download %s (%u)\n", debugstr_w(url), rc);
                 msi_free( url );
                 return rc;
             }
-            if ((p = strrchrW( temppath, '\\' ))) *p = 0;
-            strcpyW( mi->sourcedir, temppath );
+            if ((p = wcsrchr( temppath, '\\' ))) *p = 0;
+            lstrcpyW( mi->sourcedir, temppath );
             PathAddBackslashW( mi->sourcedir );
             msi_free( mi->cabinet );
             mi->cabinet = strdupW( p + 1 );
@@ -901,7 +900,7 @@ UINT ready_media( MSIPACKAGE *package, BOOL compressed, MSIMEDIAINFO *mi )
     if (mi->volume_label)
     {
         /* assume first volume is in the drive */
-        if (mi->last_volume && strcmpiW( mi->last_volume, mi->volume_label ))
+        if (mi->last_volume && wcsicmp( mi->last_volume, mi->volume_label ))
         {
             WCHAR *source = msi_dup_property( package->db, szSourceDir );
             BOOL match = source_matches_volume( mi, source );
@@ -951,12 +950,12 @@ UINT msi_add_cabinet_stream( MSIPACKAGE *package, UINT disk_id, IStorage *storag
         }
     }
     if (!(cab = msi_alloc( sizeof(*cab) ))) return ERROR_OUTOFMEMORY;
-    if (!(cab->stream = msi_alloc( (strlenW( name ) + 1) * sizeof(WCHAR ) )))
+    if (!(cab->stream = msi_alloc( (lstrlenW( name ) + 1) * sizeof(WCHAR ) )))
     {
         msi_free( cab );
         return ERROR_OUTOFMEMORY;
     }
-    strcpyW( cab->stream, name );
+    lstrcpyW( cab->stream, name );
     cab->disk_id = disk_id;
     cab->storage = storage;
     IStorage_AddRef( storage );
diff --git a/dll/win32/msi/msi.c b/dll/win32/msi/msi.c
index 7b6455b4a26..24bcf9c4edf 100644
--- a/dll/win32/msi/msi.c
+++ b/dll/win32/msi/msi.c
@@ -48,7 +48,6 @@
 
 #include "wine/debug.h"
 #include "wine/exception.h"
-#include "wine/unicode.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(msi);
 
@@ -387,14 +386,14 @@ static UINT MSI_ApplyPatchW(LPCWSTR szPatchPackage, LPCWSTR szProductCode, LPCWS
     if (!szCommandLine)
         cmd_ptr = empty;
 
-    size = strlenW(cmd_ptr) + strlenW(fmt) + strlenW(szPatchPackage) + 1;
+    size = lstrlenW(cmd_ptr) + lstrlenW(fmt) + lstrlenW(szPatchPackage) + 1;
     cmd = msi_alloc(size * sizeof(WCHAR));
     if (!cmd)
     {
         msi_free(codes);
         return ERROR_OUTOFMEMORY;
     }
-    sprintfW(cmd, fmt, cmd_ptr, szPatchPackage);
+    swprintf(cmd, size, fmt, cmd_ptr, szPatchPackage);
 
     if (szProductCode)
         r = MsiConfigureProductExW(szProductCode, INSTALLLEVEL_DEFAULT, INSTALLSTATE_DEFAULT, cmd);
@@ -632,7 +631,7 @@ static UINT MSI_ApplicablePatchXML( MSIPACKAGE *package, IXMLDOMDocument *desc )
         IXMLDOMNode_Release( node );
         if (hr == S_OK)
         {
-            if (!strcmpW( s, product_code )) r = ERROR_SUCCESS;
+            if (!wcscmp( s, product_code )) r = ERROR_SUCCESS;
             SysFreeString( s );
         }
     }
@@ -809,7 +808,7 @@ static UINT open_package( const WCHAR *product, const WCHAR *usersid,
 
     if ((localpath = msi_reg_get_val_str( props, szLocalPackage )))
     {
-        strcpyW( sourcepath, localpath );
+        lstrcpyW( sourcepath, localpath );
         msi_free( localpath );
     }
     RegCloseKey( props );
@@ -821,7 +820,7 @@ static UINT open_package( const WCHAR *product, const WCHAR *usersid,
         sz = sizeof(filename);
         MsiSourceListGetInfoW( product, usersid, context, MSICODE_PRODUCT,
                                INSTALLPROPERTY_PACKAGENAMEW, filename, &sz );
-        strcatW( sourcepath, filename );
+        lstrcatW( sourcepath, filename );
     }
     if (GetFileAttributesW( sourcepath ) == INVALID_FILE_ATTRIBUTES)
         return ERROR_INSTALL_SOURCE_ABSENT;
@@ -929,7 +928,7 @@ UINT WINAPI MsiConfigureProductExW(LPCWSTR szProduct, int iInstallLevel,
     MsiSourceListGetInfoW(szProduct, NULL, context, MSICODE_PRODUCT,
                           INSTALLPROPERTY_PACKAGENAMEW, filename, &sz);
 
-    strcatW(sourcepath, filename);
+    lstrcatW(sourcepath, filename);
 
     r = MSI_InstallPackage( package, sourcepath, commandline );
 
@@ -1106,7 +1105,7 @@ static WCHAR *reg_get_value( HKEY hkey, const WCHAR *name, DWORD *type )
         DWORD val;
 
         if (!msi_reg_get_val_dword( hkey, name, &val )) return NULL;
-        sprintfW( temp, fmt, val );
+        swprintf( temp, ARRAY_SIZE(temp), fmt, val );
         return strdupW( temp );
     }
 
@@ -1152,22 +1151,22 @@ static UINT MSI_GetProductInfo(LPCWSTR szProduct, LPCWSTR szAttribute,
         context = MSIINSTALLCONTEXT_MACHINE;
     }
 
-    if (!strcmpW( szAttribute, INSTALLPROPERTY_HELPLINKW ) ||
-        !strcmpW( szAttribute, INSTALLPROPERTY_HELPTELEPHONEW ) ||
-        !strcmpW( szAttribute, INSTALLPROPERTY_INSTALLDATEW ) ||
-        !strcmpW( szAttribute, INSTALLPROPERTY_INSTALLEDPRODUCTNAMEW ) ||
-        !strcmpW( szAttribute, INSTALLPROPERTY_INSTALLLOCATIONW ) ||
-        !strcmpW( szAttribute, INSTALLPROPERTY_INSTALLSOURCEW ) ||
-        !strcmpW( szAttribute, INSTALLPROPERTY_LOCALPACKAGEW ) ||
-        !strcmpW( szAttribute, INSTALLPROPERTY_PUBLISHERW ) ||
-        !strcmpW( szAttribute, INSTALLPROPERTY_URLINFOABOUTW ) ||
-        !strcmpW( szAttribute, INSTALLPROPERTY_URLUPDATEINFOW ) ||
-        !strcmpW( szAttribute, INSTALLPROPERTY_VERSIONMINORW ) ||
-        !strcmpW( szAttribute, INSTALLPROPERTY_VERSIONMAJORW ) ||
-        !strcmpW( szAttribute, INSTALLPROPERTY_VERSIONSTRINGW ) ||
-        !strcmpW( szAttribute, INSTALLPROPERTY_PRODUCTIDW ) ||
-        !strcmpW( szAttribute, INSTALLPROPERTY_REGCOMPANYW ) ||
-        !strcmpW( szAttribute, INSTALLPROPERTY_REGOWNERW ))
+    if (!wcscmp( szAttribute, INSTALLPROPERTY_HELPLINKW ) ||
+        !wcscmp( szAttribute, INSTALLPROPERTY_HELPTELEPHONEW ) ||
+        !wcscmp( szAttribute, INSTALLPROPERTY_INSTALLDATEW ) ||
+        !wcscmp( szAttribute, INSTALLPROPERTY_INSTALLEDPRODUCTNAMEW ) ||
+        !wcscmp( szAttribute, INSTALLPROPERTY_INSTALLLOCATIONW ) ||
+        !wcscmp( szAttribute, INSTALLPROPERTY_INSTALLSOURCEW ) ||
+        !wcscmp( szAttribute, INSTALLPROPERTY_LOCALPACKAGEW ) ||
+        !wcscmp( szAttribute, INSTALLPROPERTY_PUBLISHERW ) ||
+        !wcscmp( szAttribute, INSTALLPROPERTY_URLINFOABOUTW ) ||
+        !wcscmp( szAttribute, INSTALLPROPERTY_URLUPDATEINFOW ) ||
+        !wcscmp( szAttribute, INSTALLPROPERTY_VERSIONMINORW ) ||
+        !wcscmp( szAttribute, INSTALLPROPERTY_VERSIONMAJORW ) ||
+        !wcscmp( szAttribute, INSTALLPROPERTY_VERSIONSTRINGW ) ||
+        !wcscmp( szAttribute, INSTALLPROPERTY_PRODUCTIDW ) ||
+        !wcscmp( szAttribute, INSTALLPROPERTY_REGCOMPANYW ) ||
+        !wcscmp( szAttribute, INSTALLPROPERTY_REGOWNERW ))
     {
         if (!prodkey)
         {
@@ -1180,9 +1179,9 @@ static UINT MSI_GetProductInfo(LPCWSTR szProduct, LPCWSTR szAttribute,
             goto done;
         }
 
-        if (!strcmpW( szAttribute, INSTALLPROPERTY_INSTALLEDPRODUCTNAMEW ))
+        if (!wcscmp( szAttribute, INSTALLPROPERTY_INSTALLEDPRODUCTNAMEW ))
             szAttribute = display_name;
-        else if (!strcmpW( szAttribute, INSTALLPROPERTY_VERSIONSTRINGW ))
+        else if (!wcscmp( szAttribute, INSTALLPROPERTY_VERSIONSTRINGW ))
             szAttribute = display_version;
 
         val = reg_get_value(userdata, szAttribute, &type);
@@ -1190,16 +1189,16 @@ static UINT MSI_GetProductInfo(LPCWSTR szProduct, LPCWSTR szAttribute,
             val = empty;
         RegCloseKey(userdata);
     }
-    else if (!strcmpW( szAttribute, INSTALLPROPERTY_INSTANCETYPEW ) ||
-             !strcmpW( szAttribute, INSTALLPROPERTY_TRANSFORMSW ) ||
-             !strcmpW( szAttribute, INSTALLPROPERTY_LANGUAGEW ) ||
-             !strcmpW( szAttribute, INSTALLPROPERTY_PRODUCTNAMEW ) ||
-             !strcmpW( szAttribute, INSTALLPROPERTY_ASSIGNMENTTYPEW ) ||
-             !strcmpW( szAttribute, INSTALLPROPERTY_PACKAGECODEW ) ||
-             !strcmpW( szAttribute, INSTALLPROPERTY_VERSIONW ) ||
-             !strcmpW( szAttribute, INSTALLPROPERTY_PRODUCTICONW ) ||
-             !strcmpW( szAttribute, INSTALLPROPERTY_PACKAGENAMEW ) ||
-             !strcmpW( szAttribute, INSTALLPROPERTY_AUTHORIZED_LUA_APPW ))
+    else if (!wcscmp( szAttribute, INSTALLPROPERTY_INSTANCETYPEW ) ||
+             !wcscmp( szAttribute, INSTALLPROPERTY_TRANSFORMSW ) ||
+             !wcscmp( szAttribute, INSTALLPROPERTY_LANGUAGEW ) ||
+             !wcscmp( szAttribute, INSTALLPROPERTY_PRODUCTNAMEW ) ||
+             !wcscmp( szAttribute, INSTALLPROPERTY_ASSIGNMENTTYPEW ) ||
+             !wcscmp( szAttribute, INSTALLPROPERTY_PACKAGECODEW ) ||
+             !wcscmp( szAttribute, INSTALLPROPERTY_VERSIONW ) ||
+             !wcscmp( szAttribute, INSTALLPROPERTY_PRODUCTICONW ) ||
+             !wcscmp( szAttribute, INSTALLPROPERTY_PACKAGENAMEW ) ||
+             !wcscmp( szAttribute, INSTALLPROPERTY_AUTHORIZED_LUA_APPW ))
     {
         if (!prodkey)
         {
@@ -1207,10 +1206,10 @@ static UINT MSI_GetProductInfo(LPCWSTR szProduct, LPCWSTR szAttribute,
             goto done;
         }
 
-        if (!strcmpW( szAttribute, INSTALLPROPERTY_ASSIGNMENTTYPEW ))
+        if (!wcscmp( szAttribute, INSTALLPROPERTY_ASSIGNMENTTYPEW ))
             szAttribute = assignment;
 
-        if (!strcmpW( szAttribute, INSTALLPROPERTY_PACKAGENAMEW ))
+        if (!wcscmp( szAttribute, INSTALLPROPERTY_PACKAGENAMEW ))
         {
             res = RegOpenKeyW(prodkey, sourcelist, &source);
             if (res != ERROR_SUCCESS)
@@ -1233,7 +1232,7 @@ static UINT MSI_GetProductInfo(LPCWSTR szProduct, LPCWSTR szAttribute,
         }
 
         if (val != empty && type != REG_DWORD &&
-            !strcmpW( szAttribute, INSTALLPROPERTY_PACKAGECODEW ))
+            !wcscmp( szAttribute, INSTALLPROPERTY_PACKAGECODEW ))
         {
             if (lstrlenW( val ) != SQUASHED_GUID_SIZE - 1)
                 badconfig = TRUE;
@@ -1254,7 +1253,7 @@ static UINT MSI_GetProductInfo(LPCWSTR szProduct, LPCWSTR szAttribute,
 
     if (pcchValueBuf)
     {
-        int len = strlenW( val );
+        int len = lstrlenW( val );
 
         /* If szBuffer (szValue->str) is NULL, there's no need to copy the value
          * out.  Also, *pcchValueBuf may be uninitialized in this case, so we
@@ -1405,7 +1404,7 @@ static UINT msi_copy_outval(LPWSTR val, LPWSTR out, LPDWORD size)
 
     if (out)
     {
-        if (strlenW(val) >= *size)
+        if (lstrlenW(val) >= *size)
         {
             r = ERROR_MORE_DATA;
             if (*size > 0)
@@ -1491,23 +1490,23 @@ UINT WINAPI MsiGetProductInfoExW(LPCWSTR szProductCode, LPCWSTR szUserSid,
             goto done;
     }
 
-    if (!strcmpW( szProperty, INSTALLPROPERTY_HELPLINKW ) ||
-        !strcmpW( szProperty, INSTALLPROPERTY_HELPTELEPHONEW ) ||
-        !strcmpW( szProperty, INSTALLPROPERTY_INSTALLDATEW ) ||
-        !strcmpW( szProperty, INSTALLPROPERTY_INSTALLEDPRODUCTNAMEW ) ||
-        !strcmpW( szProperty, INSTALLPROPERTY_INSTALLLOCATIONW ) ||
-        !strcmpW( szProperty, INSTALLPROPERTY_INSTALLSOURCEW ) ||
-        !strcmpW( szProperty, INSTALLPROPERTY_LOCALPACKAGEW ) ||
-        !strcmpW( szProperty, INSTALLPROPERTY_PUBLISHERW ) ||
-        !strcmpW( szProperty, INSTALLPROPERTY_URLINFOABOUTW ) ||
-        !strcmpW( szProperty, INSTALLPROPERTY_URLUPDATEINFOW ) ||
-        !strcmpW( szProperty, INSTALLPROPERTY_VERSIONMINORW ) ||
-        !strcmpW( szProperty, INSTALLPROPERTY_VERSIONMAJORW ) ||
-        !strcmpW( szProperty, INSTALLPROPERTY_VERSIONSTRINGW ) ||
-        !strcmpW( szProperty, INSTALLPROPERTY_PRODUCTIDW ) ||
-        !strcmpW( szProperty, INSTALLPROPERTY_REGCOMPANYW ) ||
-        !strcmpW( szProperty, INSTALLPROPERTY_REGOWNERW ) ||
-        !strcmpW( szProperty, INSTALLPROPERTY_INSTANCETYPEW ))
+    if (!wcscmp( szProperty, INSTALLPROPERTY_HELPLINKW ) ||
+        !wcscmp( szProperty, INSTALLPROPERTY_HELPTELEPHONEW ) ||
+        !wcscmp( szProperty, INSTALLPROPERTY_INSTALLDATEW ) ||
+        !wcscmp( szProperty, INSTALLPROPERTY_INSTALLEDPRODUCTNAMEW ) ||
+        !wcscmp( szProperty, INSTALLPROPERTY_INSTALLLOCATIONW ) ||
+        !wcscmp( szProperty, INSTALLPROPERTY_INSTALLSOURCEW ) ||
+        !wcscmp( szProperty, INSTALLPROPERTY_LOCALPACKAGEW ) ||
+        !wcscmp( szProperty, INSTALLPROPERTY_PUBLISHERW ) ||
+        !wcscmp( szProperty, INSTALLPROPERTY_URLINFOABOUTW ) ||
+        !wcscmp( szProperty, INSTALLPROPERTY_URLUPDATEINFOW ) ||
+        !wcscmp( szProperty, INSTALLPROPERTY_VERSIONMINORW ) ||
+        !wcscmp( szProperty, INSTALLPROPERTY_VERSIONMAJORW ) ||
+        !wcscmp( szProperty, INSTALLPROPERTY_VERSIONSTRINGW ) ||
+        !wcscmp( szProperty, INSTALLPROPERTY_PRODUCTIDW ) ||
+        !wcscmp( szProperty, INSTALLPROPERTY_REGCOMPANYW ) ||
+        !wcscmp( szProperty, INSTALLPROPERTY_REGOWNERW ) ||
+        !wcscmp( szProperty, INSTALLPROPERTY_INSTANCETYPEW ))
     {
         val = reg_get_value(props, package, &type);
         if (!val)
@@ -1520,9 +1519,9 @@ UINT WINAPI MsiGetProductInfoExW(LPCWSTR szProductCode, LPCWSTR szUserSid,
 
         msi_free(val);
 
-        if (!strcmpW( szProperty, INSTALLPROPERTY_INSTALLEDPRODUCTNAMEW ))
+        if (!wcscmp( szProperty, INSTALLPROPERTY_INSTALLEDPRODUCTNAMEW ))
             szProperty = displayname;
-        else if (!strcmpW( szProperty, INSTALLPROPERTY_VERSIONSTRINGW ))
+        else if (!wcscmp( szProperty, INSTALLPROPERTY_VERSIONSTRINGW ))
             szProperty = displayversion;
 
         val = reg_get_value(props, szProperty, &type);
@@ -1531,14 +1530,14 @@ UINT WINAPI MsiGetProductInfoExW(LPCWSTR szProductCode, LPCWSTR szUserSid,
 
         r = msi_copy_outval(val, szValue, pcchValue);
     }
-    else if (!strcmpW( szProperty, INSTALLPROPERTY_TRANSFORMSW ) ||
-             !strcmpW( szProperty, INSTALLPROPERTY_LANGUAGEW ) ||
-             !strcmpW( szProperty, INSTALLPROPERTY_PRODUCTNAMEW ) ||
-             !strcmpW( szProperty, INSTALLPROPERTY_PACKAGECODEW ) ||
-             !strcmpW( szProperty, INSTALLPROPERTY_VERSIONW ) ||
-             !strcmpW( szProperty, INSTALLPROPERTY_PRODUCTICONW ) ||
-             !strcmpW( szProperty, INSTALLPROPERTY_PACKAGENAMEW ) ||
-             !strcmpW( szProperty, INSTALLPROPERTY_AUTHORIZED_LUA_APPW ))
+    else if (!wcscmp( szProperty, INSTALLPROPERTY_TRANSFORMSW ) ||
+             !wcscmp( szProperty, INSTALLPROPERTY_LANGUAGEW ) ||
+             !wcscmp( szProperty, INSTALLPROPERTY_PRODUCTNAMEW ) ||
+             !wcscmp( szProperty, INSTALLPROPERTY_PACKAGECODEW ) ||
+             !wcscmp( szProperty, INSTALLPROPERTY_VERSIONW ) ||
+             !wcscmp( szProperty, INSTALLPROPERTY_PRODUCTICONW ) ||
+             !wcscmp( szProperty, INSTALLPROPERTY_PACKAGENAMEW ) ||
+             !wcscmp( szProperty, INSTALLPROPERTY_AUTHORIZED_LUA_APPW ))
     {
         if (!prod && !classes)
             goto done;
@@ -1556,7 +1555,7 @@ UINT WINAPI MsiGetProductInfoExW(LPCWSTR szProductCode, LPCWSTR szUserSid,
 
         r = msi_copy_outval(val, szValue, pcchValue);
     }
-    else if (!strcmpW( szProperty, INSTALLPROPERTY_PRODUCTSTATEW ))
+    else if (!wcscmp( szProperty, INSTALLPROPERTY_PRODUCTSTATEW ))
     {
         if (dwContext == MSIINSTALLCONTEXT_MACHINE)
         {
@@ -1590,7 +1589,7 @@ UINT WINAPI MsiGetProductInfoExW(LPCWSTR szProductCode, LPCWSTR szUserSid,
 
         r = msi_copy_outval(val, szValue, pcchValue);
     }
-    else if (!strcmpW( szProperty, INSTALLPROPERTY_ASSIGNMENTTYPEW ))
+    else if (!wcscmp( szProperty, INSTALLPROPERTY_ASSIGNMENTTYPEW ))
     {
         if (!prod && !classes)
             goto done;
@@ -1734,7 +1733,7 @@ UINT WINAPI MsiGetPatchInfoExW(LPCWSTR szPatchCode, LPCWSTR szProductCode,
     if (dwContext == MSIINSTALLCONTEXT_MACHINE && szUserSid)
         return ERROR_INVALID_PARAMETER;
 
-    if (szUserSid && !strcmpW( szUserSid, szLocalSid ))
+    if (szUserSid && !wcscmp( szUserSid, szLocalSid ))
         return ERROR_INVALID_PARAMETER;
 
     if (MSIREG_OpenUserDataProductKey(szProductCode, dwContext, NULL,
@@ -1755,7 +1754,7 @@ UINT WINAPI MsiGetPatchInfoExW(LPCWSTR szPatchCode, LPCWSTR szProductCode,
     if (res != ERROR_SUCCESS)
         goto done;
 
-    if (!strcmpW( szProperty, INSTALLPROPERTY_TRANSFORMSW ))
+    if (!wcscmp( szProperty, INSTALLPROPERTY_TRANSFORMSW ))
     {
         if (MSIREG_OpenProductKey(szProductCode, NULL, dwContext,
                                   &prod, FALSE) != ERROR_SUCCESS)
@@ -1774,21 +1773,21 @@ UINT WINAPI MsiGetPatchInfoExW(LPCWSTR szPatchCode, LPCWSTR szProductCode,
                                         &udpatch, FALSE) != ERROR_SUCCESS)
             goto done;
 
-        if (!strcmpW( szProperty, INSTALLPROPERTY_LOCALPACKAGEW ))
+        if (!wcscmp( szProperty, INSTALLPROPERTY_LOCALPACKAGEW ))
         {
             if (dwContext == MSIINSTALLCONTEXT_USERMANAGED)
                 szProperty = szManagedPackage;
             datakey = udpatch;
         }
-        else if (!strcmpW( szProperty, INSTALLPROPERTY_INSTALLDATEW ))
+        else if (!wcscmp( szProperty, INSTALLPROPERTY_INSTALLDATEW ))
         {
             datakey = patch;
             szProperty = szInstalled;
         }
-        else if (!strcmpW( szProperty, INSTALLPROPERTY_UNINSTALLABLEW ) ||
-                 !strcmpW( szProperty, INSTALLPROPERTY_PATCHSTATEW ) ||
-                 !strcmpW( szProperty, INSTALLPROPERTY_DISPLAYNAMEW ) ||
-                 !strcmpW( szProperty, INSTALLPROPERTY_MOREINFOURLW ))
+        else if (!wcscmp( szProperty, INSTALLPROPERTY_UNINSTALLABLEW ) ||
+                 !wcscmp( szProperty, INSTALLPROPERTY_PATCHSTATEW ) ||
+                 !wcscmp( szProperty, INSTALLPROPERTY_DISPLAYNAMEW ) ||
+                 !wcscmp( szProperty, INSTALLPROPERTY_MOREINFOURLW ))
         {
             datakey = patch;
         }
@@ -1894,7 +1893,7 @@ UINT WINAPI MsiGetPatchInfoW( LPCWSTR patch, LPCWSTR attr, LPWSTR buffer, LPDWOR
     if (!patch || !attr)
         return ERROR_INVALID_PARAMETER;
 
-    if (strcmpW( INSTALLPROPERTY_LOCALPACKAGEW, attr ))
+    if (wcscmp( INSTALLPROPERTY_LOCALPACKAGEW, attr ))
         return ERROR_UNKNOWN_PROPERTY;
 
     index = 0;
@@ -2832,7 +2831,7 @@ static BOOL open_userdata_comp_key( const WCHAR *comp, const WCHAR *usersid, MSI
     }
     if (ctx & (MSIINSTALLCONTEXT_USERMANAGED|MSIINSTALLCONTEXT_USERUNMANAGED))
     {
-        if (usersid && !strcmpiW( usersid, szAllSid ))
+        if (usersid && !wcsicmp( usersid, szAllSid ))
         {
             FIXME( "only looking at the current user\n" );
             usersid = NULL;
@@ -3039,7 +3038,7 @@ static UINT query_feature_state( const WCHAR *product, const WCHAR *squashed, co
         }
         path = msi_reg_get_val_str( hkey, squashed );
         if (!path) missing = TRUE;
-        else if (strlenW( path ) > 2 &&
+        else if (lstrlenW( path ) > 2 &&
                  path[0] >= '0' && path[0] <= '9' &&
                  path[1] >= '0' && path[1] <= '9')
         {
@@ -3245,11 +3244,11 @@ static UINT get_file_version( const WCHAR *path, WCHAR *verbuf, DWORD *verlen,
     {
         if (VerQueryValueW( version, szVersionResource, (LPVOID *)&ffi, &len ) && len > 0)
         {
-            sprintfW( tmp, szVersionFormat,
+            swprintf( tmp, ARRAY_SIZE(tmp), szVersionFormat,
                       HIWORD(ffi->dwFileVersionMS), LOWORD(ffi->dwFileVersionMS),
                       HIWORD(ffi->dwFileVersionLS), LOWORD(ffi->dwFileVersionLS) );
             if (verbuf) lstrcpynW( verbuf, tmp, *verlen );
-            len = strlenW( tmp );
+            len = lstrlenW( tmp );
             if (*verlen > len) ret = ERROR_SUCCESS;
             *verlen = len;
         }
@@ -3263,9 +3262,9 @@ static UINT get_file_version( const WCHAR *path, WCHAR *verbuf, DWORD *verlen,
     {
         if (VerQueryValueW( version, szLangResource, (LPVOID *)&lang, &len ) && len > 0)
         {
-            sprintfW( tmp, szLangFormat, *lang );
+            swprintf( tmp, ARRAY_SIZE(tmp), szLangFormat, *lang );
             if (langbuf) lstrcpynW( langbuf, tmp, *langlen );
-            len = strlenW( tmp );
+            len = lstrlenW( tmp );
             if (*langlen > len) ret = ERROR_SUCCESS;
             *langlen = len;
         }
@@ -3300,11 +3299,11 @@ UINT WINAPI MsiGetFileVersionW( LPCWSTR path, LPWSTR verbuf, LPDWORD verlen,
         int len;
         WCHAR *version = msi_get_font_file_version( NULL, path );
         if (!version) return ERROR_FILE_INVALID;
-        len = strlenW( version );
+        len = lstrlenW( version );
         if (len >= *verlen) ret = ERROR_MORE_DATA;
         else if (verbuf)
         {
-            strcpyW( verbuf, version );
+            lstrcpyW( verbuf, version );
             ret = ERROR_SUCCESS;
         }
         *verlen = len;
@@ -3486,7 +3485,7 @@ static UINT MSI_ProvideQualifiedComponentEx(LPCWSTR szComponent,
         RegCloseKey( hkey );
         if (!components) return ERROR_FILE_NOT_FOUND;
 
-        if (strlenW( components ) < BASE85_SIZE || !decode_base85_guid( components, &guid ))
+        if (lstrlenW( components ) < BASE85_SIZE || !decode_base85_guid( components, &guid ))
         {
             msi_free( components );
             return ERROR_FILE_NOT_FOUND;
@@ -4049,7 +4048,7 @@ UINT WINAPI MsiReinstallFeatureW( LPCWSTR szProduct, LPCWSTR szFeature, DWORD dw
     sz = sizeof(filename);
     MsiSourceListGetInfoW( szProduct, NULL, context, MSICODE_PRODUCT,
                            INSTALLPROPERTY_PACKAGENAMEW, filename, &sz );
-    strcatW( sourcepath, filename );
+    lstrcatW( sourcepath, filename );
 
     if (dwReinstallMode & REINSTALLMODE_PACKAGE)
         r = MSI_OpenPackageW( sourcepath, 0, &package );
@@ -4059,14 +4058,14 @@ UINT WINAPI MsiReinstallFeatureW( LPCWSTR szProduct, LPCWSTR szFeature, DWORD dw
     if (r != ERROR_SUCCESS)
         return r;
 
-    sz = (strlenW( fmtW ) + strlenW( szReinstallMode ) + strlenW( reinstallmode )) * sizeof(WCHAR);
-    sz += (strlenW( szReinstall ) + strlenW( szFeature )) * sizeof(WCHAR);
+    sz = (lstrlenW( fmtW ) + lstrlenW( szReinstallMode ) + lstrlenW( reinstallmode )) * sizeof(WCHAR);
+    sz += (lstrlenW( szReinstall ) + lstrlenW( szFeature )) * sizeof(WCHAR);
     if (!(cmdline = msi_alloc( sz )))
     {
         msiobj_release( &package->hdr );
         return ERROR_OUTOFMEMORY;
     }
-    sprintfW( cmdline, fmtW, szReinstallMode, reinstallmode, szReinstall, szFeature );
+    swprintf( cmdline, sz / sizeof(WCHAR), fmtW, szReinstallMode, reinstallmode, szReinstall, szFeature );
 
     r = MSI_InstallPackage( package, sourcepath, cmdline );
     msiobj_release( &package->hdr );
diff --git a/dll/win32/msi/msipriv.h b/dll/win32/msi/msipriv.h
index 3d5df922f23..7519cccaeb5 100644
--- a/dll/win32/msi/msipriv.h
+++ b/dll/win32/msi/msipriv.h
@@ -852,10 +852,10 @@ extern BOOL decode_streamname(LPCWSTR in, LPWSTR out) DECLSPEC_HIDDEN;
 extern UINT msi_get_stream( MSIDATABASE *, const WCHAR *, IStream ** ) DECLSPEC_HIDDEN;
 extern UINT MSI_OpenDatabaseW( LPCWSTR, LPCWSTR, MSIDATABASE ** ) DECLSPEC_HIDDEN;
 extern UINT MSI_DatabaseOpenViewW(MSIDATABASE *, LPCWSTR, MSIQUERY ** ) DECLSPEC_HIDDEN;
-extern UINT MSI_OpenQuery( MSIDATABASE *, MSIQUERY **, LPCWSTR, ... ) DECLSPEC_HIDDEN;
+extern UINT WINAPIV MSI_OpenQuery( MSIDATABASE *, MSIQUERY **, LPCWSTR, ... ) DECLSPEC_HIDDEN;
 typedef UINT (*record_func)( MSIRECORD *, LPVOID );
 extern UINT MSI_IterateRecords( MSIQUERY *, LPDWORD, record_func, LPVOID ) DECLSPEC_HIDDEN;
-extern MSIRECORD *MSI_QueryGetRecord( MSIDATABASE *db, LPCWSTR query, ... ) DECLSPEC_HIDDEN;
+extern MSIRECORD * WINAPIV MSI_QueryGetRecord( MSIDATABASE *db, LPCWSTR query, ... ) DECLSPEC_HIDDEN;
 extern UINT MSI_DatabaseGetPrimaryKeys( MSIDATABASE *, LPCWSTR, MSIRECORD ** ) DECLSPEC_HIDDEN;
 
 /* view internals */
diff --git a/dll/win32/msi/msiquery.c b/dll/win32/msi/msiquery.c
index f04e98257c4..146fde40ff7 100644
--- a/dll/win32/msi/msiquery.c
+++ b/dll/win32/msi/msiquery.c
@@ -27,7 +27,6 @@
 #include "winerror.h"
 #include "wine/debug.h"
 #include "wine/exception.h"
-#include "wine/unicode.h"
 #include "msi.h"
 #include "msiquery.h"
 #include "objbase.h"
@@ -74,9 +73,9 @@ UINT VIEW_find_column( MSIVIEW *table, LPCWSTR name, LPCWSTR table_name, UINT *n
                                          NULL, &haystack_table_name );
         if( r != ERROR_SUCCESS )
             return r;
-        x = strcmpW( name, col_name );
+        x = wcscmp( name, col_name );
         if( table_name )
-            x |= strcmpW( table_name, haystack_table_name );
+            x |= wcscmp( table_name, haystack_table_name );
         if( !x )
         {
             *n = i;
@@ -138,7 +137,7 @@ UINT MSI_DatabaseOpenViewW(MSIDATABASE *db,
     return r;
 }
 
-UINT MSI_OpenQuery( MSIDATABASE *db, MSIQUERY **view, LPCWSTR fmt, ... )
+UINT WINAPIV MSI_OpenQuery( MSIDATABASE *db, MSIQUERY **view, LPCWSTR fmt, ... )
 {
     UINT r;
     int size = 100, res;
@@ -147,11 +146,11 @@ UINT MSI_OpenQuery( MSIDATABASE *db, MSIQUERY **view, LPCWSTR fmt, ... )
     /* construct the string */
     for (;;)
     {
-        va_list va;
+        __ms_va_list va;
         query = msi_alloc( size*sizeof(WCHAR) );
-        va_start(va, fmt);
-        res = vsnprintfW(query, size, fmt, va);
-        va_end(va);
+        __ms_va_start(va, fmt);
+        res = vswprintf(query, size, fmt, va);
+        __ms_va_end(va);
         if (res == -1) size *= 2;
         else if (res >= size) size = res + 1;
         else break;
@@ -201,7 +200,7 @@ UINT MSI_IterateRecords( MSIQUERY *view, LPDWORD count,
 }
 
 /* return a single record from a query */
-MSIRECORD *MSI_QueryGetRecord( MSIDATABASE *db, LPCWSTR fmt, ... )
+MSIRECORD * WINAPIV MSI_QueryGetRecord( MSIDATABASE *db, LPCWSTR fmt, ... )
 {
     MSIRECORD *rec = NULL;
     MSIQUERY *view = NULL;
@@ -212,11 +211,11 @@ MSIRECORD *MSI_QueryGetRecord( MSIDATABASE *db, LPCWSTR fmt, ... )
     /* construct the string */
     for (;;)
     {
-        va_list va;
+        __ms_va_list va;
         query = msi_alloc( size*sizeof(WCHAR) );
-        va_start(va, fmt);
-        res = vsnprintfW(query, size, fmt, va);
-        va_end(va);
+        __ms_va_start(va, fmt);
+        res = vswprintf(query, size, fmt, va);
+        __ms_va_end(va);
         if (res == -1) size *= 2;
         else if (res >= size) size = res + 1;
         else break;
@@ -592,7 +591,7 @@ static UINT msi_set_record_type_string( MSIRECORD *rec, UINT field,
     if (type & MSITYPE_NULLABLE)
         szType[0] &= ~0x20;
 
-    sprintfW( &szType[1], fmt, (type&0xff) );
+    swprintf( &szType[1], ARRAY_SIZE(szType) - 1, fmt, (type&0xff) );
 
     TRACE("type %04x -> %s\n", type, debugstr_w(szType) );
 
diff --git a/dll/win32/msi/package.c b/dll/win32/msi/package.c
index 7438ad82a1e..f54352f4f23 100644
--- a/dll/win32/msi/package.c
+++ b/dll/win32/msi/package.c
@@ -45,7 +45,6 @@
 #include "wine/heap.h"
 #include "wine/debug.h"
 #include "wine/exception.h"
-#include "wine/unicode.h"
 
 #include "msipriv.h"
 #include "winemsi_s.h"
@@ -563,12 +562,12 @@ static LPWSTR get_fusion_filename(MSIPACKAGE *package)
         size = ARRAY_SIZE(path);
         if (!RegQueryValueExW(hkey, installpath, NULL, &type, (BYTE *)path, &size))
         {
-            len = strlenW(path) + strlenW(fusion) + 2;
+            len = lstrlenW(path) + lstrlenW(fusion) + 2;
             if (!(filename = msi_alloc(len * sizeof(WCHAR)))) return NULL;
 
-            strcpyW(filename, path);
-            strcatW(filename, szBackSlash);
-            strcatW(filename, fusion);
+            lstrcpyW(filename, path);
+            lstrcatW(filename, szBackSlash);
+            lstrcatW(filename, fusion);
             if (GetFileAttributesW(filename) != INVALID_FILE_ATTRIBUTES)
             {
                 TRACE( "found %s\n", debugstr_w(filename) );
@@ -584,15 +583,15 @@ static LPWSTR get_fusion_filename(MSIPACKAGE *package)
     {
         RegCloseKey(hkey);
         GetWindowsDirectoryW(windir, MAX_PATH);
-        len = strlenW(windir) + strlenW(subdir) + strlenW(v2050727) + strlenW(fusion) + 3;
+        len = lstrlenW(windir) + lstrlenW(subdir) + lstrlenW(v2050727) + lstrlenW(fusion) + 3;
         if (!(filename = msi_alloc(len * sizeof(WCHAR)))) return NULL;
 
-        strcpyW(filename, windir);
-        strcatW(filename, szBackSlash);
-        strcatW(filename, subdir);
-        strcatW(filename, v2050727);
-        strcatW(filename, szBackSlash);
-        strcatW(filename, fusion);
+        lstrcpyW(filename, windir);
+        lstrcatW(filename, szBackSlash);
+        lstrcatW(filename, subdir);
+        lstrcatW(filename, v2050727);
+        lstrcatW(filename, szBackSlash);
+        lstrcatW(filename, fusion);
         if (GetFileAttributesW(filename) != INVALID_FILE_ATTRIBUTES)
         {
             TRACE( "found %s\n", debugstr_w(filename) );
@@ -651,7 +650,7 @@ static void set_msi_assembly_prop(MSIPACKAGE *package)
     if (!VerQueryValueW(version, translation, (LPVOID *)&translate, &val_len))
         goto done;
 
-    sprintfW(buf, verfmt, translate[0].wLanguage, translate[0].wCodePage);
+    swprintf(buf, ARRAY_SIZE(buf), verfmt, translate[0].wLanguage, translate[0].wCodePage);
 
     if (!VerQueryValueW(version, buf, (LPVOID *)&verstr, &val_len))
         goto done;
@@ -765,91 +764,91 @@ static VOID set_installer_properties(MSIPACKAGE *package)
      */
 
     SHGetFolderPathW(NULL, CSIDL_COMMON_APPDATA, NULL, 0, pth);
-    strcatW(pth, szBackSlash);
+    lstrcatW(pth, szBackSlash);
     msi_set_property( package->db, szCommonAppDataFolder, pth, -1 );
 
     SHGetFolderPathW(NULL, CSIDL_FAVORITES, NULL, 0, pth);
-    strcatW(pth, szBackSlash);
+    lstrcatW(pth, szBackSlash);
     msi_set_property( package->db, szFavoritesFolder, pth, -1 );
 
     SHGetFolderPathW(NULL, CSIDL_FONTS, NULL, 0, pth);
-    strcatW(pth, szBackSlash);
+    lstrcatW(pth, szBackSlash);
     msi_set_property( package->db, szFontsFolder, pth, -1 );
 
     SHGetFolderPathW(NULL, CSIDL_SENDTO, NULL, 0, pth);
-    strcatW(pth, szBackSlash);
+    lstrcatW(pth, szBackSlash);
     msi_set_property( package->db, szSendToFolder, pth, -1 );
 
     SHGetFolderPathW(NULL, CSIDL_STARTMENU, NULL, 0, pth);
-    strcatW(pth, szBackSlash);
+    lstrcatW(pth, szBackSlash);
     msi_set_property( package->db, szStartMenuFolder, pth, -1 );
 
     SHGetFolderPathW(NULL, CSIDL_STARTUP, NULL, 0, pth);
-    strcatW(pth, szBackSlash);
+    lstrcatW(pth, szBackSlash);
     msi_set_property( package->db, szStartupFolder, pth, -1 );
 
     SHGetFolderPathW(NULL, CSIDL_TEMPLATES, NULL, 0, pth);
-    strcatW(pth, szBackSlash);
+    lstrcatW(pth, szBackSlash);
     msi_set_property( package->db, szTemplateFolder, pth, -1 );
 
     SHGetFolderPathW(NULL, CSIDL_DESKTOP, NULL, 0, pth);
-    strcatW(pth, szBackSlash);
+    lstrcatW(pth, szBackSlash);
     msi_set_property( package->db, szDesktopFolder, pth, -1 );
 
     /* FIXME: set to AllUsers profile path if ALLUSERS is set */
     SHGetFolderPathW(NULL, CSIDL_PROGRAMS, NULL, 0, pth);
-    strcatW(pth, szBackSlash);
+    lstrcatW(pth, szBackSlash);
     msi_set_property( package->db, szProgramMenuFolder, pth, -1 );
 
     SHGetFolderPathW(NULL, CSIDL_ADMINTOOLS, NULL, 0, pth);
-    strcatW(pth, szBackSlash);
+    lstrcatW(pth, szBackSlash);
     msi_set_property( package->db, szAdminToolsFolder, pth, -1 );
 
     SHGetFolderPathW(NULL, CSIDL_APPDATA, NULL, 0, pth);
-    strcatW(pth, szBackSlash);
+    lstrcatW(pth, szBackSlash);
     msi_set_property( package->db, szAppDataFolder, pth, -1 );
 
     SHGetFolderPathW(NULL, CSIDL_SYSTEM, NULL, 0, pth);
-    strcatW(pth, szBackSlash);
+    lstrcatW(pth, szBackSlash);
     msi_set_property( package->db, szSystemFolder, pth, -1 );
     msi_set_property( package->db, szSystem16Folder, pth, -1 );
 
     SHGetFolderPathW(NULL, CSIDL_LOCAL_APPDATA, NULL, 0, pth);
-    strcatW(pth, szBackSlash);
+    lstrcatW(pth, szBackSlash);
     msi_set_property( package->db, szLocalAppDataFolder, pth, -1 );
 
     SHGetFolderPathW(NULL, CSIDL_MYPICTURES, NULL, 0, pth);
-    strcatW(pth, szBackSlash);
+    lstrcatW(pth, szBackSlash);
     msi_set_property( package->db, szMyPicturesFolder, pth, -1 );
 
     SHGetFolderPathW(NULL, CSIDL_PERSONAL, NULL, 0, pth);
-    strcatW(pth, szBackSlash);
+    lstrcatW(pth, szBackSlash);
     msi_set_property( package->db, szPersonalFolder, pth, -1 );
 
     SHGetFolderPathW(NULL, CSIDL_WINDOWS, NULL, 0, pth);
-    strcatW(pth, szBackSlash);
+    lstrcatW(pth, szBackSlash);
     msi_set_property( package->db, szWindowsFolder, pth, -1 );
     
     SHGetFolderPathW(NULL, CSIDL_PRINTHOOD, NULL, 0, pth);
-    strcatW(pth, szBackSlash);
+    lstrcatW(pth, szBackSlash);
     msi_set_property( package->db, szPrintHoodFolder, pth, -1 );
 
     SHGetFolderPathW(NULL, CSIDL_NETHOOD, NULL, 0, pth);
-    strcatW(pth, szBackSlash);
+    lstrcatW(pth, szBackSlash);
     msi_set_property( package->db, szNetHoodFolder, pth, -1 );
 
     SHGetFolderPathW(NULL, CSIDL_RECENT, NULL, 0, pth);
-    strcatW(pth, szBackSlash);
+    lstrcatW(pth, szBackSlash);
     msi_set_property( package->db, szRecentFolder, pth, -1 );
 
     /* Physical Memory is specified in MB. Using total amount. */
     msex.dwLength = sizeof(msex);
     GlobalMemoryStatusEx( &msex );
-    len = sprintfW( bufstr, szIntFormat, (int)(msex.ullTotalPhys / 1024 / 1024) );
+    len = swprintf( bufstr, ARRAY_SIZE(bufstr), szIntFormat, (int)(msex.ullTotalPhys / 1024 / 1024) );
     msi_set_property( package->db, szPhysicalMemory, bufstr, len );
 
     SHGetFolderPathW(NULL, CSIDL_WINDOWS, NULL, 0, pth);
-    ptr = strchrW(pth,'\\');
+    ptr = wcschr(pth,'\\');
     if (ptr) *(ptr + 1) = 0;
     msi_set_property( package->db, szWindowsVolume, pth, -1 );
     
@@ -864,7 +863,7 @@ static VOID set_installer_properties(MSIPACKAGE *package)
     OSVersion.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEXW);
     GetVersionExW((OSVERSIONINFOW *)&OSVersion);
     verval = OSVersion.dwMinorVersion + OSVersion.dwMajorVersion * 100;
-    len = sprintfW( verstr, szFormat, verval );
+    len = swprintf( verstr, ARRAY_SIZE(verstr), szFormat, verval );
     switch (OSVersion.dwPlatformId)
     {
         case VER_PLATFORM_WIN32_WINDOWS:    
@@ -872,25 +871,25 @@ static VOID set_installer_properties(MSIPACKAGE *package)
             break;
         case VER_PLATFORM_WIN32_NT:
             msi_set_property( package->db, szVersionNT, verstr, len );
-            len = sprintfW( bufstr, szFormat,OSVersion.wProductType );
+            len = swprintf( bufstr, ARRAY_SIZE(bufstr), szFormat,OSVersion.wProductType );
             msi_set_property( package->db, szMsiNTProductType, bufstr, len );
             break;
     }
-    len = sprintfW( bufstr, szFormat, OSVersion.dwBuildNumber );
+    len = swprintf( bufstr, ARRAY_SIZE(bufstr), szFormat, OSVersion.dwBuildNumber );
     msi_set_property( package->db, szWindowsBuild, bufstr, len );
-    len = sprintfW( bufstr, szFormat, OSVersion.wServicePackMajor );
+    len = swprintf( bufstr, ARRAY_SIZE(bufstr), szFormat, OSVersion.wServicePackMajor );
     msi_set_property( package->db, szServicePackLevel, bufstr, len );
 
-    len = sprintfW( bufstr, szFormat2, MSI_MAJORVERSION, MSI_MINORVERSION );
+    len = swprintf( bufstr, ARRAY_SIZE(bufstr), szFormat2, MSI_MAJORVERSION, MSI_MINORVERSION );
     msi_set_property( package->db, szVersionMsi, bufstr, len );
-    len = sprintfW( bufstr, szFormat, MSI_MAJORVERSION * 100 );
+    len = swprintf( bufstr, ARRAY_SIZE(bufstr), szFormat, MSI_MAJORVERSION * 100 );
     msi_set_property( package->db, szVersionDatabase, bufstr, len );
 
     RegOpenKeyExW(HKEY_LOCAL_MACHINE, szCurrentVersion, 0,
         KEY_QUERY_VALUE | KEY_WOW64_64KEY, &hkey);
 
     GetNativeSystemInfo( &sys_info );
-    len = sprintfW( bufstr, szIntFormat, sys_info.wProcessorLevel );
+    len = swprintf( bufstr, ARRAY_SIZE(bufstr), szIntFormat, sys_info.wProcessorLevel );
     msi_set_property( package->db, szIntel, bufstr, len );
     if (sys_info.u.s.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_INTEL)
     {
@@ -947,11 +946,11 @@ static VOID set_installer_properties(MSIPACKAGE *package)
 
     /* Screen properties. */
     dc = GetDC(0);
-    len = sprintfW( bufstr, szIntFormat, GetDeviceCaps(dc, HORZRES) );
+    len = swprintf( bufstr, ARRAY_SIZE(bufstr), szIntFormat, GetDeviceCaps(dc, HORZRES) );
     msi_set_property( package->db, szScreenX, bufstr, len );
-    len = sprintfW( bufstr, szIntFormat, GetDeviceCaps(dc, VERTRES) );
+    len = swprintf( bufstr, ARRAY_SIZE(bufstr), szIntFormat, GetDeviceCaps(dc, VERTRES) );
     msi_set_property( package->db, szScreenY, bufstr, len );
-    len = sprintfW( bufstr, szIntFormat, GetDeviceCaps(dc, BITSPIXEL) );
+    len = swprintf( bufstr, ARRAY_SIZE(bufstr), szIntFormat, GetDeviceCaps(dc, BITSPIXEL) );
     msi_set_property( package->db, szColorBits, bufstr, len );
     ReleaseDC(0, dc);
 
@@ -991,14 +990,14 @@ static VOID set_installer_properties(MSIPACKAGE *package)
     set_msi_assembly_prop( package );
 
     langid = GetUserDefaultLangID();
-    len = sprintfW( bufstr, szIntFormat, langid );
+    len = swprintf( bufstr, ARRAY_SIZE(bufstr), szIntFormat, langid );
     msi_set_property( package->db, szUserLanguageID, bufstr, len );
 
     langid = GetSystemDefaultLangID();
-    len = sprintfW( bufstr, szIntFormat, langid );
+    len = swprintf( bufstr, ARRAY_SIZE(bufstr), szIntFormat, langid );
     msi_set_property( package->db, szSystemLangID, bufstr, len );
 
-    len = sprintfW( bufstr, szIntFormat, MsiQueryProductStateW(package->ProductCode) );
+    len = swprintf( bufstr, ARRAY_SIZE(bufstr), szIntFormat, MsiQueryProductStateW(package->ProductCode) );
     msi_set_property( package->db, szProductState, bufstr, len );
 
     len = 0;
@@ -1115,7 +1114,7 @@ MSIPACKAGE *MSI_CreatePackage( MSIDATABASE *db )
         set_installer_properties( package );
 
         package->ui_level = gUILevel;
-        len = sprintfW( uilevel, fmtW, gUILevel & INSTALLUILEVEL_MASK );
+        len = swprintf( uilevel, ARRAY_SIZE(uilevel), fmtW, gUILevel & INSTALLUILEVEL_MASK );
         msi_set_property( package->db, szUILevel, uilevel, len );
 
         r = msi_load_suminfo_properties( package );
@@ -1180,14 +1179,14 @@ UINT msi_create_empty_local_file( LPWSTR path, LPCWSTR suffix )
 
     time = GetTickCount();
     GetWindowsDirectoryW( path, MAX_PATH );
-    strcatW( path, szInstaller );
+    lstrcatW( path, szInstaller );
     CreateDirectoryW( path, NULL );
 
-    len = strlenW(path);
+    len = lstrlenW(path);
     for (i = 0; i < 0x10000; i++)
     {
-        offset = snprintfW( path + len, MAX_PATH - len, fmt, (time + i) & 0xffff );
-        memcpy( path + len + offset, suffix, (strlenW( suffix ) + 1) * sizeof(WCHAR) );
+        offset = swprintf( path + len, MAX_PATH - len, fmt, (time + i) & 0xffff );
+        memcpy( path + len + offset, suffix, (lstrlenW( suffix ) + 1) * sizeof(WCHAR) );
         handle = CreateFileW( path, GENERIC_WRITE, 0, NULL,
                               CREATE_NEW, FILE_ATTRIBUTE_NORMAL, 0 );
         if (handle != INVALID_HANDLE_VALUE)
@@ -1205,11 +1204,11 @@ UINT msi_create_empty_local_file( LPWSTR path, LPCWSTR suffix )
 
 static enum platform parse_platform( const WCHAR *str )
 {
-    if (!str[0] || !strcmpW( str, szIntel )) return PLATFORM_INTEL;
-    else if (!strcmpW( str, szIntel64 )) return PLATFORM_INTEL64;
-    else if (!strcmpW( str, szX64 ) || !strcmpW( str, szAMD64 )) return PLATFORM_X64;
-    else if (!strcmpW( str, szARM )) return PLATFORM_ARM;
-    else if (!strcmpW( str, szARM64 )) return PLATFORM_ARM64;
+    if (!str[0] || !wcscmp( str, szIntel )) return PLATFORM_INTEL;
+    else if (!wcscmp( str, szIntel64 )) return PLATFORM_INTEL64;
+    else if (!wcscmp( str, szX64 ) || !wcscmp( str, szAMD64 )) return PLATFORM_X64;
+    else if (!wcscmp( str, szARM )) return PLATFORM_ARM;
+    else if (!wcscmp( str, szARM64 )) return PLATFORM_ARM64;
     return PLATFORM_UNKNOWN;
 }
 
@@ -1227,7 +1226,7 @@ static UINT parse_suminfo( MSISUMMARYINFO *si, MSIPACKAGE *package )
 
     TRACE("template: %s\n", debugstr_w(template));
 
-    p = strchrW( template, ';' );
+    p = wcschr( template, ';' );
     if (!p)
     {
         WARN("invalid template string %s\n", debugstr_w(template));
@@ -1236,12 +1235,12 @@ static UINT parse_suminfo( MSISUMMARYINFO *si, MSIPACKAGE *package )
     }
     *p = 0;
     platform = template;
-    if ((q = strchrW( platform, ',' ))) *q = 0;
+    if ((q = wcschr( platform, ',' ))) *q = 0;
     package->platform = parse_platform( platform );
     while (package->platform == PLATFORM_UNKNOWN && q)
     {
         platform = q + 1;
-        if ((q = strchrW( platform, ',' ))) *q = 0;
+        if ((q = wcschr( platform, ',' ))) *q = 0;
         package->platform = parse_platform( platform );
     }
     if (package->platform == PLATFORM_UNKNOWN)
@@ -1257,7 +1256,7 @@ static UINT parse_suminfo( MSISUMMARYINFO *si, MSIPACKAGE *package )
         return ERROR_SUCCESS;
     }
     count = 1;
-    for (q = p; (q = strchrW( q, ',' )); q++) count++;
+    for (q = p; (q = wcschr( q, ',' )); q++) count++;
 
     package->langids = msi_alloc( count * sizeof(LANGID) );
     if (!package->langids)
@@ -1269,9 +1268,9 @@ static UINT parse_suminfo( MSISUMMARYINFO *si, MSIPACKAGE *package )
     i = 0;
     while (*p)
     {
-        q = strchrW( p, ',' );
+        q = wcschr( p, ',' );
         if (q) *q = 0;
-        package->langids[i] = atoiW( p );
+        package->langids[i] = wcstol( p, NULL, 10 );
         if (!q) break;
         p = q + 1;
         i++;
@@ -1337,7 +1336,7 @@ static WCHAR *get_property( MSIDATABASE *db, const WCHAR *prop )
     MSIRECORD *rec;
     WCHAR *ret = NULL;
 
-    sprintfW(query, select_query, prop);
+    swprintf(query, ARRAY_SIZE(query), select_query, prop);
     if (MSI_DatabaseOpenViewW( db, query, &view ) != ERROR_SUCCESS)
     {
         return NULL;
@@ -1388,7 +1387,7 @@ static UINT get_registered_local_package( const WCHAR *product, WCHAR *localfile
     if (!filename)
         return ERROR_FUNCTION_FAILED;
 
-    strcpyW( localfile, filename );
+    lstrcpyW( localfile, filename );
     msi_free( filename );
     return ERROR_SUCCESS;
 }
@@ -1471,7 +1470,7 @@ UINT MSI_OpenPackageW(LPCWSTR szPackage, DWORD dwOptions, MSIPACKAGE **pPackage)
     localfile[0] = 0;
     if( szPackage[0] == '#' )
     {
-        handle = atoiW(&szPackage[1]);
+        handle = wcstol(&szPackage[1], NULL, 10);
         if (!(db = msihandle2msiinfo(handle, MSIHANDLETYPE_DATABASE)))
             return ERROR_INVALID_HANDLE;
     }
@@ -1543,7 +1542,7 @@ UINT MSI_OpenPackageW(LPCWSTR szPackage, DWORD dwOptions, MSIPACKAGE **pPackage)
         {
             WCHAR *cache_version = get_product_version( db );
             if (!product_version != !cache_version ||
-                    (product_version && strcmpW(product_version, cache_version)))
+                    (product_version && wcscmp(product_version, cache_version)))
             {
                 msiobj_release( &db->hdr );
                 msi_free(product_version);
@@ -2041,11 +2040,11 @@ INT MSI_ProcessMessage( MSIPACKAGE *package, INSTALLMESSAGE eMessageType, MSIREC
                 return 0;
             }
 
-            template = msi_alloc((strlenW(template_rec) + strlenW(template_prefix) + 1) * sizeof(WCHAR));
+            template = msi_alloc((lstrlenW(template_rec) + lstrlenW(template_prefix) + 1) * sizeof(WCHAR));
             if (!template) return ERROR_OUTOFMEMORY;
 
-            strcpyW(template, template_prefix);
-            strcatW(template, template_rec);
+            lstrcpyW(template, template_prefix);
+            lstrcatW(template, template_rec);
             MSI_RecordSetStringW(record, 0, template);
 
             msi_free(template_prefix);
@@ -2071,11 +2070,10 @@ INT MSI_ProcessMessage( MSIPACKAGE *package, INSTALLMESSAGE eMessageType, MSIREC
         {
             static const WCHAR template_s[] =
                 {'{','{','%','s',':',' ','}','}','%','s',0};
-            WCHAR *template;
-
-            template = msi_alloc((strlenW(package->LastAction) + strlenW(package->LastActionTemplate) + 7) * sizeof(WCHAR));
+            size_t len = lstrlenW(package->LastAction) + lstrlenW(package->LastActionTemplate) + 7;
+            WCHAR *template = msi_alloc(len * sizeof(WCHAR));
             if (!template) return ERROR_OUTOFMEMORY;
-            sprintfW(template, template_s, package->LastAction, package->LastActionTemplate);
+            swprintf(template, len, template_s, package->LastAction, package->LastActionTemplate);
             MSI_RecordSetStringW(record, 0, template);
             msi_free(template);
         }
@@ -2205,22 +2203,22 @@ UINT msi_set_property( MSIDATABASE *db, const WCHAR *name, const WCHAR *value, i
     if (!name[0])
         return value ? ERROR_FUNCTION_FAILED : ERROR_SUCCESS;
 
-    if (value && len < 0) len = strlenW( value );
+    if (value && len < 0) len = lstrlenW( value );
 
     rc = msi_get_property( db, name, 0, &sz );
     if (!value || (!*value && !len))
     {
-        sprintfW( query, delete_query, name );
+        swprintf( query, ARRAY_SIZE(query), delete_query, name );
     }
     else if (rc == ERROR_MORE_DATA || rc == ERROR_SUCCESS)
     {
-        sprintfW( query, update_query, name );
+        swprintf( query, ARRAY_SIZE(query), update_query, name );
         row = MSI_CreateRecord(1);
         msi_record_set_string( row, 1, value, len );
     }
     else
     {
-        strcpyW( query, insert_query );
+        lstrcpyW( query, insert_query );
         row = MSI_CreateRecord(2);
         msi_record_set_string( row, 1, name, -1 );
         msi_record_set_string( row, 2, value, len );
@@ -2264,7 +2262,7 @@ UINT WINAPI MsiSetPropertyW( MSIHANDLE hInstall, LPCWSTR szName, LPCWSTR szValue
     }
 
     ret = msi_set_property( package->db, szName, szValue, -1 );
-    if (ret == ERROR_SUCCESS && !strcmpW( szName, szSourceDir ))
+    if (ret == ERROR_SUCCESS && !wcscmp( szName, szSourceDir ))
         msi_reset_source_folders( package );
 
     msiobj_release( &package->hdr );
@@ -2289,7 +2287,7 @@ static MSIRECORD *msi_get_property_row( MSIDATABASE *db, LPCWSTR name )
     if (!name || !*name)
         return NULL;
 
-    if (!strcmpW(name, szDate))
+    if (!wcscmp(name, szDate))
     {
         length = GetDateFormatW(LOCALE_USER_DEFAULT, DATE_SHORTDATE, NULL, NULL, NULL, 0);
         if (!length)
@@ -2307,7 +2305,7 @@ static MSIRECORD *msi_get_property_row( MSIDATABASE *db, LPCWSTR name )
         msi_free(buffer);
         return row;
     }
-    else if (!strcmpW(name, szTime))
+    else if (!wcscmp(name, szTime))
     {
         length = GetTimeFormatW(LOCALE_USER_DEFAULT, TIME_NOTIMEMARKER, NULL, NULL, NULL, 0);
         if (!length)
@@ -2404,7 +2402,7 @@ LPWSTR msi_dup_property(MSIDATABASE *db, LPCWSTR prop)
 int msi_get_property_int( MSIDATABASE *db, LPCWSTR prop, int def )
 {
     LPWSTR str = msi_dup_property( db, prop );
-    int val = str ? atoiW(str) : def;
+    int val = str ? wcstol(str, NULL, 10) : def;
     msi_free(str);
     return val;
 }
@@ -2459,7 +2457,7 @@ UINT WINAPI MsiGetPropertyA(MSIHANDLE hinst, const char *name, char *buf, DWORD
                 midl_user_free(value);
                 return ERROR_OUTOFMEMORY;
             }
-            strcpyW(tmp, value);
+            lstrcpyW(tmp, value);
 
             r = msi_strncpyWtoA(tmp, len, buf, sz, TRUE);
 
@@ -2522,7 +2520,7 @@ UINT WINAPI MsiGetPropertyW(MSIHANDLE hinst, const WCHAR *name, WCHAR *buf, DWOR
                 midl_user_free(value);
                 return ERROR_OUTOFMEMORY;
             }
-            strcpyW(tmp, value);
+            lstrcpyW(tmp, value);
 
             r = msi_strncpyW(tmp, len, buf, sz);
 
@@ -2728,7 +2726,7 @@ UINT msi_package_add_info(MSIPACKAGE *package, DWORD context, DWORD options,
 
     LIST_FOR_EACH_ENTRY( info, &package->sourcelist_info, MSISOURCELISTINFO, entry )
     {
-        if (!strcmpW( info->value, value )) return ERROR_SUCCESS;
+        if (!wcscmp( info->value, value )) return ERROR_SUCCESS;
     }
 
     info = msi_alloc(sizeof(MSISOURCELISTINFO));
diff --git a/dll/win32/msi/patch.c b/dll/win32/msi/patch.c
index bd9b7b87df4..35b8463858e 100644
--- a/dll/win32/msi/patch.c
+++ b/dll/win32/msi/patch.c
@@ -27,7 +27,6 @@
 #include "objbase.h"
 #include "shlwapi.h"
 #include "wine/debug.h"
-#include "wine/unicode.h"
 #include "msipriv.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(msi);
@@ -71,7 +70,7 @@ static struct transform_desc *parse_transform_desc( const WCHAR *str )
 
     if (!(ret = msi_alloc_zero( sizeof(*ret) ))) return NULL;
 
-    q = strchrW( p, '}' );
+    q = wcschr( p, '}' );
     if (*p != '{' || !q) goto error;
 
     len = q - p + 1;
@@ -80,14 +79,14 @@ static struct transform_desc *parse_transform_desc( const WCHAR *str )
     ret->product_code_from[len] = 0;
 
     p = q + 1;
-    if (!(q = strchrW( p, ';' ))) goto error;
+    if (!(q = wcschr( p, ';' ))) goto error;
     len = q - p;
     if (!(ret->version_from = msi_alloc( (len + 1) * sizeof(WCHAR) ))) goto error;
     memcpy( ret->version_from, p, len * sizeof(WCHAR) );
     ret->version_from[len] = 0;
 
     p = q + 1;
-    q = strchrW( p, '}' );
+    q = wcschr( p, '}' );
     if (*p != '{' || !q) goto error;
 
     len = q - p + 1;
@@ -96,14 +95,14 @@ static struct transform_desc *parse_transform_desc( const WCHAR *str )
     ret->product_code_to[len] = 0;
 
     p = q + 1;
-    if (!(q = strchrW( p, ';' ))) goto error;
+    if (!(q = wcschr( p, ';' ))) goto error;
     len = q - p;
     if (!(ret->version_to = msi_alloc( (len + 1) * sizeof(WCHAR) ))) goto error;
     memcpy( ret->version_to, p, len * sizeof(WCHAR) );
     ret->version_to[len] = 0;
 
     p = q + 1;
-    q = strchrW( p, '}' );
+    q = wcschr( p, '}' );
     if (*p != '{' || !q) goto error;
 
     len = q - p + 1;
@@ -173,7 +172,7 @@ static UINT check_transform_applicable( MSIPACKAGE *package, IStorage *transform
 
     if (wanted_flags & MSITRANSFORM_VALIDATE_LANGUAGE)
     {
-        if (!template[0] || ((p = strchrW( template, ';' )) && match_language( package, atoiW( p + 1 ) )))
+        if (!template[0] || ((p = wcschr( template, ';' )) && match_language( package, wcstol( p + 1, NULL, 10 ) )))
         {
             valid_flags |= MSITRANSFORM_VALIDATE_LANGUAGE;
         }
@@ -189,7 +188,7 @@ static UINT check_transform_applicable( MSIPACKAGE *package, IStorage *transform
             msiobj_release( &si->hdr );
             return ERROR_INSTALL_PACKAGE_INVALID;
         }
-        if (!strcmpW( desc->product_code_from, product_code_installed ))
+        if (!wcscmp( desc->product_code_from, product_code_installed ))
         {
             valid_flags |= MSITRANSFORM_VALIDATE_PRODUCT;
         }
@@ -245,7 +244,7 @@ static UINT check_transform_applicable( MSIPACKAGE *package, IStorage *transform
             msiobj_release( &si->hdr );
             return ERROR_INSTALL_PACKAGE_INVALID;
         }
-        if (!strcmpW( desc->upgrade_code, upgrade_code_installed ))
+        if (!wcscmp( desc->upgrade_code, upgrade_code_installed ))
             valid_flags |= MSITRANSFORM_VALIDATE_UPGRADECODE;
         msi_free( upgrade_code_installed );
     }
@@ -303,7 +302,7 @@ UINT msi_check_patch_applicable( MSIPACKAGE *package, MSISUMMARYINFO *si )
     guids = msi_split_string( guid_list, ';' );
     for (i = 0; guids[i] && ret != ERROR_SUCCESS; i++)
     {
-        if (!strcmpW( guids[i], product_code )) ret = ERROR_SUCCESS;
+        if (!wcscmp( guids[i], product_code )) ret = ERROR_SUCCESS;
     }
     msi_free( guids );
     msi_free( guid_list );
@@ -333,7 +332,7 @@ static UINT msi_parse_patch_summary( MSISUMMARYINFO *si, MSIPATCHINFO **patch )
         msi_free( pi );
         return ERROR_PATCH_PACKAGE_INVALID;
     }
-    if (!(p = strchrW( p + 1, '}' )))
+    if (!(p = wcschr( p + 1, '}' )))
     {
         msi_free( pi->patchcode );
         msi_free( pi );
@@ -526,7 +525,7 @@ static UINT patch_update_file_sequence( MSIDATABASE *db, const struct patch_offs
 
     LIST_FOR_EACH_ENTRY( po, &pos->files, struct patch_offset, entry )
     {
-        if (!strcmpiW( file, po->name ))
+        if (!wcsicmp( file, po->name ))
         {
             MSI_RecordSetInteger( rec, 8, seq + pos->offset_to_apply );
             r = MSI_ViewModify( view, MSIMODIFY_UPDATE, rec );
@@ -557,7 +556,7 @@ static UINT patch_update_filepatch_sequence( MSIDATABASE *db, const struct patch
 
     LIST_FOR_EACH_ENTRY( po, &pos->patches, struct patch_offset, entry )
     {
-        if (seq == po->sequence && !strcmpiW( file, po->name ))
+        if (seq == po->sequence && !wcsicmp( file, po->name ))
         {
             MSIQUERY *delete_view, *insert_view;
             MSIRECORD *rec2;
@@ -858,7 +857,7 @@ static DWORD is_uninstallable( MSIDATABASE *db )
     if (MSI_ViewFetch( view, &rec ) == ERROR_SUCCESS)
     {
         const WCHAR *value = MSI_RecordGetString( rec, 1 );
-        ret = atoiW( value );
+        ret = wcstol( value, NULL, 10 );
         msiobj_release( &rec->hdr );
     }
 
@@ -1005,17 +1004,17 @@ UINT msi_apply_transforms( MSIPACKAGE *package )
             if (!PathIsRelativeW( xforms[i] )) transform = xforms[i];
             else
             {
-                WCHAR *p = strrchrW( package->PackagePath, '\\' );
+                WCHAR *p = wcsrchr( package->PackagePath, '\\' );
                 DWORD len = p - package->PackagePath + 1;
 
-                if (!(transform = msi_alloc( (len + strlenW( xforms[i] ) + 1) * sizeof(WCHAR)) ))
+                if (!(transform = msi_alloc( (len + lstrlenW( xforms[i] ) + 1) * sizeof(WCHAR)) ))
                 {
                     msi_free( xforms );
                     msi_free( xform_list );
                     return ERROR_OUTOFMEMORY;
                 }
                 memcpy( transform, package->PackagePath, len * sizeof(WCHAR) );
-                memcpy( transform + len, xforms[i], (strlenW( xforms[i] ) + 1) * sizeof(WCHAR) );
+                memcpy( transform + len, xforms[i], (lstrlenW( xforms[i] ) + 1) * sizeof(WCHAR) );
             }
             r = MSI_DatabaseApplyTransformW( package->db, transform, 0 );
             if (transform != xforms[i]) msi_free( transform );
diff --git a/dll/win32/msi/record.c b/dll/win32/msi/record.c
index cca63083d18..0a352adcd87 100644
--- a/dll/win32/msi/record.c
+++ b/dll/win32/msi/record.c
@@ -27,7 +27,6 @@
 #include "winuser.h"
 #include "winerror.h"
 #include "wine/debug.h"
-#include "wine/unicode.h"
 #include "msi.h"
 #include "msiquery.h"
 #include "msipriv.h"
@@ -582,7 +581,7 @@ UINT msi_record_set_string( MSIRECORD *rec, UINT field, const WCHAR *value, int
 
     MSI_FreeField( &rec->fields[field] );
 
-    if (value && len < 0) len = strlenW( value );
+    if (value && len < 0) len = lstrlenW( value );
 
     if (value && len)
     {
diff --git a/dll/win32/msi/registry.c b/dll/win32/msi/registry.c
index 8b90254914a..4d439d0b304 100644
--- a/dll/win32/msi/registry.c
+++ b/dll/win32/msi/registry.c
@@ -32,7 +32,6 @@
 #include "msi.h"
 #include "msipriv.h"
 #include "wincrypt.h"
-#include "wine/unicode.h"
 #include "winver.h"
 #include "winuser.h"
 #include "sddl.h"
@@ -338,15 +337,15 @@ DWORD msi_version_str_to_dword(LPCWSTR p)
     if (!p)
         return version;
 
-    major = atoiW(p);
+    major = wcstol(p, NULL, 10);
 
-    p = strchrW(p, '.');
+    p = wcschr(p, '.');
     if (p)
     {
-        minor = atoiW(p+1);
-        p = strchrW(p+1, '.');
+        minor = wcstol(p+1, NULL, 10);
+        p = wcschr(p+1, '.');
         if (p)
-            build = atoiW(p+1);
+            build = wcstol(p+1, NULL, 10);
     }
 
     return MAKELONG(build, MAKEWORD(minor, major));
@@ -456,8 +455,8 @@ UINT MSIREG_OpenUninstallKey(const WCHAR *product, enum platform platform, HKEY
         access |= KEY_WOW64_32KEY;
     else
         access |= KEY_WOW64_64KEY;
-    strcpyW(keypath, szUninstall);
-    strcatW(keypath, product);
+    lstrcpyW(keypath, szUninstall);
+    lstrcatW(keypath, product);
     if (create) return RegCreateKeyExW(HKEY_LOCAL_MACHINE, keypath, 0, NULL, 0, access, NULL, key, NULL);
     return RegOpenKeyExW(HKEY_LOCAL_MACHINE, keypath, 0, access, key);
 }
@@ -492,14 +491,14 @@ UINT MSIREG_OpenProductKey(LPCWSTR szProduct, LPCWSTR szUserSid, MSIINSTALLCONTE
 
     if (context == MSIINSTALLCONTEXT_MACHINE)
     {
-        strcpyW(keypath, szInstaller_LocalClassesProd);
-        strcatW( keypath, squashed_pc );
+        lstrcpyW(keypath, szInstaller_LocalClassesProd);
+        lstrcatW( keypath, squashed_pc );
     }
     else if (context == MSIINSTALLCONTEXT_USERUNMANAGED)
     {
         root = HKEY_CURRENT_USER;
-        strcpyW(keypath, szUserProducts);
-        strcatW( keypath, squashed_pc );
+        lstrcpyW(keypath, szUserProducts);
+        lstrcatW( keypath, squashed_pc );
     }
     else
     {
@@ -512,7 +511,7 @@ UINT MSIREG_OpenProductKey(LPCWSTR szProduct, LPCWSTR szUserSid, MSIINSTALLCONTE
             }
             szUserSid = usersid;
         }
-        sprintfW( keypath, szInstaller_LocalManagedProd_fmt, szUserSid, squashed_pc );
+        swprintf( keypath, ARRAY_SIZE(keypath), szInstaller_LocalManagedProd_fmt, szUserSid, squashed_pc );
         LocalFree(usersid);
     }
     if (create) return RegCreateKeyExW(root, keypath, 0, NULL, 0, access, NULL, key, NULL);
@@ -526,8 +525,8 @@ UINT MSIREG_DeleteUserProductKey(LPCWSTR szProduct)
     if (!squash_guid( szProduct, squashed_pc )) return ERROR_FUNCTION_FAILED;
     TRACE("%s squashed %s\n", debugstr_w(szProduct), debugstr_w(squashed_pc));
 
-    strcpyW(keypath, szUserProducts);
-    strcatW( keypath, squashed_pc );
+    lstrcpyW(keypath, szUserProducts);
+    lstrcatW( keypath, squashed_pc );
     return RegDeleteTreeW(HKEY_CURRENT_USER, keypath);
 }
 
@@ -538,8 +537,8 @@ UINT MSIREG_OpenUserPatchesKey(LPCWSTR szPatch, HKEY *key, BOOL create)
     if (!squash_guid( szPatch, squashed_pc )) return ERROR_FUNCTION_FAILED;
     TRACE("%s squashed %s\n", debugstr_w(szPatch), debugstr_w(squashed_pc));
 
-    strcpyW(keypath, szUserPatches);
-    strcatW( keypath, squashed_pc );
+    lstrcpyW(keypath, szUserPatches);
+    lstrcatW( keypath, squashed_pc );
 
     if (create) return RegCreateKeyW(HKEY_CURRENT_USER, keypath, key);
     return RegOpenKeyW(HKEY_CURRENT_USER, keypath, key);
@@ -557,14 +556,14 @@ UINT MSIREG_OpenFeaturesKey(LPCWSTR szProduct, LPCWSTR szUserSid, MSIINSTALLCONT
 
     if (context == MSIINSTALLCONTEXT_MACHINE)
     {
-        strcpyW(keypath, szInstaller_LocalClassesFeat);
-        strcatW( keypath, squashed_pc );
+        lstrcpyW(keypath, szInstaller_LocalClassesFeat);
+        lstrcatW( keypath, squashed_pc );
     }
     else if (context == MSIINSTALLCONTEXT_USERUNMANAGED)
     {
         root = HKEY_CURRENT_USER;
-        strcpyW(keypath, szUserFeatures);
-        strcatW( keypath, squashed_pc );
+        lstrcpyW(keypath, szUserFeatures);
+        lstrcatW( keypath, squashed_pc );
     }
     else
     {
@@ -577,7 +576,7 @@ UINT MSIREG_OpenFeaturesKey(LPCWSTR szProduct, LPCWSTR szUserSid, MSIINSTALLCONT
             }
             szUserSid = usersid;
         }
-        sprintfW( keypath, szInstaller_LocalManagedFeat_fmt, szUserSid, squashed_pc );
+        swprintf( keypath, ARRAY_SIZE(keypath), szInstaller_LocalManagedFeat_fmt, szUserSid, squashed_pc );
         LocalFree(usersid);
     }
     if (create) return RegCreateKeyExW(root, keypath, 0, NULL, 0, access, NULL, key, NULL);
@@ -591,8 +590,8 @@ UINT MSIREG_DeleteUserFeaturesKey(LPCWSTR szProduct)
     if (!squash_guid( szProduct, squashed_pc )) return ERROR_FUNCTION_FAILED;
     TRACE("%s squashed %s\n", debugstr_w(szProduct), debugstr_w(squashed_pc));
 
-    strcpyW(keypath, szUserFeatures);
-    strcatW( keypath, squashed_pc );
+    lstrcpyW(keypath, szUserFeatures);
+    lstrcatW( keypath, squashed_pc );
     return RegDeleteTreeW(HKEY_CURRENT_USER, keypath);
 }
 
@@ -604,8 +603,8 @@ static UINT MSIREG_OpenInstallerFeaturesKey(LPCWSTR szProduct, HKEY *key, BOOL c
     if (!squash_guid( szProduct, squashed_pc )) return ERROR_FUNCTION_FAILED;
     TRACE("%s squashed %s\n", debugstr_w(szProduct), debugstr_w(squashed_pc));
 
-    strcpyW(keypath, szInstaller_Features);
-    strcatW( keypath, squashed_pc );
+    lstrcpyW(keypath, szInstaller_Features);
+    lstrcatW( keypath, squashed_pc );
 
     if (create) return RegCreateKeyExW(HKEY_LOCAL_MACHINE, keypath, 0, NULL, 0, access, NULL, key, NULL);
     return RegOpenKeyExW(HKEY_LOCAL_MACHINE, keypath, 0, access, key);
@@ -622,7 +621,7 @@ UINT MSIREG_OpenUserDataFeaturesKey(LPCWSTR szProduct, LPCWSTR szUserSid, MSIINS
 
     if (context == MSIINSTALLCONTEXT_MACHINE)
     {
-        sprintfW( keypath, szUserDataFeatures_fmt, szLocalSid, squashed_pc );
+        swprintf( keypath, ARRAY_SIZE(keypath), szUserDataFeatures_fmt, szLocalSid, squashed_pc );
     }
     else
     {
@@ -635,7 +634,7 @@ UINT MSIREG_OpenUserDataFeaturesKey(LPCWSTR szProduct, LPCWSTR szUserSid, MSIINS
             }
             szUserSid = usersid;
         }
-        sprintfW( keypath, szUserDataFeatures_fmt, szUserSid, squashed_pc );
+        swprintf( keypath, ARRAY_SIZE(keypath), szUserDataFeatures_fmt, szUserSid, squashed_pc );
         LocalFree(usersid);
     }
     if (create) return RegCreateKeyExW(HKEY_LOCAL_MACHINE, keypath, 0, NULL, 0, access, NULL, key, NULL);
@@ -651,15 +650,15 @@ UINT MSIREG_OpenUserComponentsKey(LPCWSTR szComponent, HKEY *key, BOOL create)
     if (!squash_guid( szComponent, squashed_cc)) return ERROR_FUNCTION_FAILED;
     TRACE("%s squashed %s\n", debugstr_w(szComponent), debugstr_w(squashed_cc));
 
-    strcpyW(keypath, szUserComponents);
-    strcatW( keypath, squashed_cc );
+    lstrcpyW(keypath, szUserComponents);
+    lstrcatW( keypath, squashed_cc );
 
     if (create) return RegCreateKeyW(HKEY_CURRENT_USER, keypath, key);
     ret = RegOpenKeyW(HKEY_CURRENT_USER, keypath, key);
     if (ret != ERROR_FILE_NOT_FOUND) return ret;
 
-    strcpyW(keypath, szInstaller_Components);
-    strcatW( keypath, squashed_cc );
+    lstrcpyW(keypath, szInstaller_Components);
+    lstrcatW( keypath, squashed_cc );
     return RegOpenKeyExW( HKEY_LOCAL_MACHINE, keypath, 0, access, key );
 }
 
@@ -678,11 +677,11 @@ UINT MSIREG_OpenUserDataComponentKey(LPCWSTR szComponent, LPCWSTR szUserSid, HKE
             ERR("Failed to retrieve user SID\n");
             return ERROR_FUNCTION_FAILED;
         }
-        sprintfW( keypath, szUserDataComp_fmt, usersid, squashed_comp );
+        swprintf( keypath, ARRAY_SIZE(keypath), szUserDataComp_fmt, usersid, squashed_comp );
         LocalFree(usersid);
     }
     else
-        sprintfW( keypath, szUserDataComp_fmt, szUserSid, squashed_comp );
+        swprintf( keypath, ARRAY_SIZE(keypath), szUserDataComp_fmt, szUserSid, squashed_comp );
 
     if (create) return RegCreateKeyExW(HKEY_LOCAL_MACHINE, keypath, 0, NULL, 0, access, NULL, key, NULL);
     return RegOpenKeyExW(HKEY_LOCAL_MACHINE, keypath, 0, access, key);
@@ -705,11 +704,11 @@ UINT MSIREG_DeleteUserDataComponentKey(LPCWSTR szComponent, LPCWSTR szUserSid)
             ERR("Failed to retrieve user SID\n");
             return ERROR_FUNCTION_FAILED;
         }
-        sprintfW(keypath, szUserDataComponents_fmt, usersid);
+        swprintf(keypath, ARRAY_SIZE(keypath), szUserDataComponents_fmt, usersid);
         LocalFree(usersid);
     }
     else
-        sprintfW(keypath, szUserDataComponents_fmt, szUserSid);
+        swprintf(keypath, ARRAY_SIZE(keypath), szUserDataComponents_fmt, szUserSid);
 
     if (RegOpenKeyExW(HKEY_LOCAL_MACHINE, keypath, 0, access, &hkey)) return ERROR_SUCCESS;
     r = RegDeleteTreeW( hkey, squashed_comp );
@@ -726,9 +725,9 @@ UINT MSIREG_OpenUserDataProductKey(LPCWSTR szProduct, MSIINSTALLCONTEXT dwContex
     TRACE("%s squashed %s\n", debugstr_w(szProduct), debugstr_w(squashed_pc));
 
     if (dwContext == MSIINSTALLCONTEXT_MACHINE)
-        sprintfW( keypath, szUserDataProd_fmt, szLocalSid, squashed_pc );
+        swprintf( keypath, ARRAY_SIZE(keypath), szUserDataProd_fmt, szLocalSid, squashed_pc );
     else if (szUserSid)
-        sprintfW( keypath, szUserDataProd_fmt, szUserSid, squashed_pc );
+        swprintf( keypath, ARRAY_SIZE(keypath), szUserDataProd_fmt, szUserSid, squashed_pc );
     else
     {
         if (!(usersid = get_user_sid()))
@@ -736,7 +735,7 @@ UINT MSIREG_OpenUserDataProductKey(LPCWSTR szProduct, MSIINSTALLCONTEXT dwContex
             ERR("Failed to retrieve user SID\n");
             return ERROR_FUNCTION_FAILED;
         }
-        sprintfW( keypath, szUserDataProd_fmt, usersid, squashed_pc );
+        swprintf( keypath, ARRAY_SIZE(keypath), szUserDataProd_fmt, usersid, squashed_pc );
         LocalFree(usersid);
     }
     if (create) return RegCreateKeyExW(HKEY_LOCAL_MACHINE, keypath, 0, NULL, 0, access, NULL, key, NULL);
@@ -752,7 +751,7 @@ UINT MSIREG_OpenUserDataPatchKey(LPCWSTR szPatch, MSIINSTALLCONTEXT dwContext, H
     TRACE("%s squashed %s\n", debugstr_w(szPatch), debugstr_w(squashed_patch));
 
     if (dwContext == MSIINSTALLCONTEXT_MACHINE)
-        sprintfW( keypath, szUserDataPatch_fmt, szLocalSid, squashed_patch );
+        swprintf( keypath, ARRAY_SIZE(keypath), szUserDataPatch_fmt, szLocalSid, squashed_patch );
     else
     {
         if (!(usersid = get_user_sid()))
@@ -760,7 +759,7 @@ UINT MSIREG_OpenUserDataPatchKey(LPCWSTR szPatch, MSIINSTALLCONTEXT dwContext, H
             ERR("Failed to retrieve user SID\n");
             return ERROR_FUNCTION_FAILED;
         }
-        sprintfW( keypath, szUserDataPatch_fmt, usersid, squashed_patch );
+        swprintf( keypath, ARRAY_SIZE(keypath), szUserDataPatch_fmt, usersid, squashed_patch );
         LocalFree(usersid);
     }
     if (create) return RegCreateKeyExW(HKEY_LOCAL_MACHINE, keypath, 0, NULL, 0, access, NULL, key, NULL);
@@ -778,7 +777,7 @@ UINT MSIREG_DeleteUserDataPatchKey(LPCWSTR patch, MSIINSTALLCONTEXT context)
     TRACE("%s squashed %s\n", debugstr_w(patch), debugstr_w(squashed_patch));
 
     if (context == MSIINSTALLCONTEXT_MACHINE)
-        sprintfW(keypath, szUserDataPatches_fmt, szLocalSid);
+        swprintf(keypath, ARRAY_SIZE(keypath), szUserDataPatches_fmt, szLocalSid);
     else
     {
         if (!(usersid = get_user_sid()))
@@ -786,7 +785,7 @@ UINT MSIREG_DeleteUserDataPatchKey(LPCWSTR patch, MSIINSTALLCONTEXT context)
             ERR("Failed to retrieve user SID\n");
             return ERROR_FUNCTION_FAILED;
         }
-        sprintfW(keypath, szUserDataPatches_fmt, usersid);
+        swprintf(keypath, ARRAY_SIZE(keypath), szUserDataPatches_fmt, usersid);
         LocalFree(usersid);
     }
     if (RegOpenKeyExW(HKEY_LOCAL_MACHINE, keypath, 0, access, &hkey)) return ERROR_SUCCESS;
@@ -804,7 +803,7 @@ UINT MSIREG_OpenUserDataProductPatchesKey(LPCWSTR product, MSIINSTALLCONTEXT con
     TRACE("%s squashed %s\n", debugstr_w(product), debugstr_w(squashed_product));
 
     if (context == MSIINSTALLCONTEXT_MACHINE)
-        sprintfW( keypath, szUserDataProductPatches_fmt, szLocalSid, squashed_product );
+        swprintf( keypath, ARRAY_SIZE(keypath), szUserDataProductPatches_fmt, szLocalSid, squashed_product );
     else
     {
         if (!(usersid = get_user_sid()))
@@ -812,7 +811,7 @@ UINT MSIREG_OpenUserDataProductPatchesKey(LPCWSTR product, MSIINSTALLCONTEXT con
             ERR("Failed to retrieve user SID\n");
             return ERROR_FUNCTION_FAILED;
         }
-        sprintfW( keypath, szUserDataProductPatches_fmt, usersid, squashed_product );
+        swprintf( keypath, ARRAY_SIZE(keypath), szUserDataProductPatches_fmt, usersid, squashed_product );
         LocalFree(usersid);
     }
     if (create) return RegCreateKeyExW(HKEY_LOCAL_MACHINE, keypath, 0, NULL, 0, access, NULL, key, NULL);
@@ -828,9 +827,9 @@ UINT MSIREG_OpenInstallProps(LPCWSTR szProduct, MSIINSTALLCONTEXT dwContext, LPC
     TRACE("%s squashed %s\n", debugstr_w(szProduct), debugstr_w(squashed_pc));
 
     if (dwContext == MSIINSTALLCONTEXT_MACHINE)
-        sprintfW( keypath, szInstallProperties_fmt, szLocalSid, squashed_pc );
+        swprintf( keypath, ARRAY_SIZE(keypath), szInstallProperties_fmt, szLocalSid, squashed_pc );
     else if (szUserSid)
-        sprintfW( keypath, szInstallProperties_fmt, szUserSid, squashed_pc );
+        swprintf( keypath, ARRAY_SIZE(keypath), szInstallProperties_fmt, szUserSid, squashed_pc );
     else
     {
         if (!(usersid = get_user_sid()))
@@ -838,7 +837,7 @@ UINT MSIREG_OpenInstallProps(LPCWSTR szProduct, MSIINSTALLCONTEXT dwContext, LPC
             ERR("Failed to retrieve user SID\n");
             return ERROR_FUNCTION_FAILED;
         }
-        sprintfW( keypath, szInstallProperties_fmt, usersid, squashed_pc );
+        swprintf( keypath, ARRAY_SIZE(keypath), szInstallProperties_fmt, usersid, squashed_pc );
         LocalFree(usersid);
     }
     if (create) return RegCreateKeyExW(HKEY_LOCAL_MACHINE, keypath, 0, NULL, 0, access, NULL, key, NULL);
@@ -856,7 +855,7 @@ UINT MSIREG_DeleteUserDataProductKey(LPCWSTR szProduct, MSIINSTALLCONTEXT contex
     TRACE("%s squashed %s\n", debugstr_w(szProduct), debugstr_w(squashed_pc));
 
     if (context == MSIINSTALLCONTEXT_MACHINE)
-        sprintfW(keypath, szUserDataProducts_fmt, szLocalSid);
+        swprintf(keypath, ARRAY_SIZE(keypath), szUserDataProducts_fmt, szLocalSid);
     else
     {
         if (!(usersid = get_user_sid()))
@@ -864,7 +863,7 @@ UINT MSIREG_DeleteUserDataProductKey(LPCWSTR szProduct, MSIINSTALLCONTEXT contex
             ERR("Failed to retrieve user SID\n");
             return ERROR_FUNCTION_FAILED;
         }
-        sprintfW(keypath, szUserDataProducts_fmt, usersid);
+        swprintf(keypath, ARRAY_SIZE(keypath), szUserDataProducts_fmt, usersid);
         LocalFree(usersid);
     }
 
@@ -898,7 +897,7 @@ UINT MSIREG_OpenPatchesKey(LPCWSTR szPatch, HKEY *key, BOOL create)
     if (!squash_guid( szPatch, squashed_pc )) return ERROR_FUNCTION_FAILED;
     TRACE("%s squashed %s\n", debugstr_w(szPatch), debugstr_w(squashed_pc));
 
-    sprintfW( keypath, szInstaller_Patches, squashed_pc );
+    swprintf( keypath, ARRAY_SIZE(keypath), szInstaller_Patches, squashed_pc );
 
     if (create) return RegCreateKeyExW(HKEY_LOCAL_MACHINE, keypath, 0, NULL, 0, access, NULL, key, NULL);
     return RegOpenKeyExW(HKEY_LOCAL_MACHINE, keypath, 0, access, key);
@@ -912,8 +911,8 @@ UINT MSIREG_OpenUpgradeCodesKey(LPCWSTR szUpgradeCode, HKEY *key, BOOL create)
     if (!squash_guid( szUpgradeCode, squashed_uc )) return ERROR_FUNCTION_FAILED;
     TRACE("%s squashed %s\n", debugstr_w(szUpgradeCode), debugstr_w(squashed_uc));
 
-    strcpyW(keypath, szInstaller_UpgradeCodes);
-    strcatW( keypath, squashed_uc );
+    lstrcpyW(keypath, szInstaller_UpgradeCodes);
+    lstrcatW( keypath, squashed_uc );
 
     if (create) return RegCreateKeyExW(HKEY_LOCAL_MACHINE, keypath, 0, NULL, 0, access, NULL, key, NULL);
     return RegOpenKeyExW(HKEY_LOCAL_MACHINE, keypath, 0, access, key);
@@ -926,8 +925,8 @@ UINT MSIREG_OpenUserUpgradeCodesKey(LPCWSTR szUpgradeCode, HKEY* key, BOOL creat
     if (!squash_guid( szUpgradeCode, squashed_uc )) return ERROR_FUNCTION_FAILED;
     TRACE("%s squashed %s\n", debugstr_w(szUpgradeCode), debugstr_w(squashed_uc));
 
-    strcpyW(keypath, szInstaller_UserUpgradeCodes);
-    strcatW( keypath, squashed_uc );
+    lstrcpyW(keypath, szInstaller_UserUpgradeCodes);
+    lstrcatW( keypath, squashed_uc );
 
     if (create) return RegCreateKeyW(HKEY_CURRENT_USER, keypath, key);
     return RegOpenKeyW(HKEY_CURRENT_USER, keypath, key);
@@ -956,8 +955,8 @@ UINT MSIREG_DeleteUserUpgradeCodesKey(LPCWSTR szUpgradeCode)
     if (!squash_guid( szUpgradeCode, squashed_uc )) return ERROR_FUNCTION_FAILED;
     TRACE("%s squashed %s\n", debugstr_w(szUpgradeCode), debugstr_w(squashed_uc));
 
-    strcpyW(keypath, szInstaller_UserUpgradeCodes);
-    strcatW( keypath, squashed_uc );
+    lstrcpyW(keypath, szInstaller_UserUpgradeCodes);
+    lstrcatW( keypath, squashed_uc );
     return RegDeleteTreeW(HKEY_CURRENT_USER, keypath);
 }
 
@@ -1001,8 +1000,8 @@ UINT MSIREG_OpenClassesUpgradeCodesKey(LPCWSTR szUpgradeCode, HKEY *key, BOOL cr
     if (!squash_guid( szUpgradeCode, squashed_uc )) return ERROR_FUNCTION_FAILED;
     TRACE("%s squashed %s\n", debugstr_w(szUpgradeCode), debugstr_w(squashed_uc));
 
-    strcpyW(keypath, szInstaller_ClassesUpgradeCode);
-    strcatW( keypath, squashed_uc );
+    lstrcpyW(keypath, szInstaller_ClassesUpgradeCode);
+    lstrcatW( keypath, squashed_uc );
 
     if (create) return RegCreateKeyExW(HKEY_LOCAL_MACHINE, keypath, 0, NULL, 0, access, NULL, key, NULL);
     return RegOpenKeyExW(HKEY_LOCAL_MACHINE, keypath, 0, access, key);
@@ -1059,8 +1058,8 @@ UINT WINAPI MsiDecomposeDescriptorW( LPCWSTR szDescriptor, LPWSTR szProduct,
 
     TRACE("product %s\n", debugstr_guid( &product ));
 
-    if (!(p = strchrW( &szDescriptor[20], '>' )))
-        p = strchrW( &szDescriptor[20], '<' );
+    if (!(p = wcschr( &szDescriptor[20], '>' )))
+        p = wcschr( &szDescriptor[20], '<' );
     if (!p)
         return ERROR_INVALID_PARAMETER;
 
@@ -1344,15 +1343,15 @@ static UINT fetch_user_component( const WCHAR *usersid, DWORD ctx, DWORD index,
     len_user = ARRAY_SIZE( user );
     while (!RegEnumKeyExW( key_users, i, user, &len_user, NULL, NULL, NULL, NULL ))
     {
-        if ((strcmpW( usersid, szAllSid ) && strcmpW( usersid, user )) ||
-            !strcmpW( szLocalSid, user ))
+        if ((wcscmp( usersid, szAllSid ) && wcscmp( usersid, user )) ||
+            !wcscmp( szLocalSid, user ))
         {
             i++;
             len_user = ARRAY_SIZE( user );
             continue;
         }
-        strcpyW( path, user );
-        strcatW( path, componentsW );
+        lstrcpyW( path, user );
+        lstrcatW( path, componentsW );
         if (RegOpenKeyExW( key_users, path, 0, access, &key_components ))
         {
             i++;
@@ -1385,7 +1384,7 @@ found:
         else if (sid)
         {
             *sid_len = len_user;
-            strcpyW( sid, user );
+            lstrcpyW( sid, user );
         }
     }
     if (guid) unsquash_guid( component, guid );
@@ -2126,7 +2125,7 @@ UINT WINAPI MsiEnumPatchesExW(LPCWSTR szProductCode, LPCWSTR szUserSid,
     if (!szProductCode || !squash_guid( szProductCode, squashed_pc ))
         return ERROR_INVALID_PARAMETER;
 
-    if (szUserSid && !strcmpW( szUserSid, szLocalSid ))
+    if (szUserSid && !wcscmp( szUserSid, szLocalSid ))
         return ERROR_INVALID_PARAMETER;
 
     if (dwContext & MSIINSTALLCONTEXT_MACHINE && szUserSid)
@@ -2319,7 +2318,7 @@ static UINT fetch_machine_product( const WCHAR *match, DWORD index, DWORD *idx,
     len = ARRAY_SIZE( product );
     while (!RegEnumKeyExW( key, i, product, &len, NULL, NULL, NULL, NULL ))
     {
-        if (match && strcmpW( match, product ))
+        if (match && wcscmp( match, product ))
         {
             i++;
             len = ARRAY_SIZE( product );
@@ -2391,14 +2390,14 @@ static UINT fetch_user_product( const WCHAR *match, const WCHAR *usersid, DWORD
     len_user = ARRAY_SIZE( user );
     while (!RegEnumKeyExW( key_users, i, user, &len_user, NULL, NULL, NULL, NULL ))
     {
-        if (strcmpW( usersid, user ) && strcmpW( usersid, szAllSid ))
+        if (wcscmp( usersid, user ) && wcscmp( usersid, szAllSid ))
         {
             i++;
             len_user = ARRAY_SIZE( user );
             continue;
         }
-        strcpyW( path, user );
-        strcatW( path, subkey );
+        lstrcpyW( path, user );
+        lstrcatW( path, subkey );
         if (RegOpenKeyExW( key_users, path, 0, access, &key_products ))
         {
             i++;
@@ -2408,7 +2407,7 @@ static UINT fetch_user_product( const WCHAR *match, const WCHAR *usersid, DWORD
         len_product = ARRAY_SIZE( product );
         while (!RegEnumKeyExW( key_products, j, product, &len_product, NULL, NULL, NULL, NULL ))
         {
-            if (match && strcmpW( match, product ))
+            if (match && wcscmp( match, product ))
             {
                 j++;
                 len_product = ARRAY_SIZE( product );
@@ -2438,7 +2437,7 @@ found:
         if (installed_ctx) *installed_ctx = ctx;
         if (sid)
         {
-            strcpyW( sid, user );
+            lstrcpyW( sid, user );
             *sid_len = len_user;
         }
         r = ERROR_SUCCESS;
diff --git a/dll/win32/msi/script.c b/dll/win32/msi/script.c
index c70790f5386..67ad8b51c52 100644
--- a/dll/win32/msi/script.c
+++ b/dll/win32/msi/script.c
@@ -30,7 +30,6 @@
 #include "activscp.h"
 #include "oleauto.h"
 #include "wine/debug.h"
-#include "wine/unicode.h"
 
 #include "msiserver.h"
 
@@ -136,7 +135,7 @@ static HRESULT WINAPI MsiActiveScriptSite_GetItemInfo(IActiveScriptSite* iface,
     }
 
     /* Are we looking for the session object? */
-    if (!strcmpW(szSession, pstrName)) {
+    if (!wcscmp(szSession, pstrName)) {
         if (dwReturnMask & SCRIPTINFO_ITYPEINFO) {
             HRESULT hr = get_typeinfo(Session_tid, ppti);
             if (SUCCEEDED(hr))
diff --git a/dll/win32/msi/source.c b/dll/win32/msi/source.c
index ed1c6b66a4b..89c04d9f7dd 100644
--- a/dll/win32/msi/source.c
+++ b/dll/win32/msi/source.c
@@ -34,7 +34,6 @@
 #include "wincrypt.h"
 #include "winver.h"
 #include "winuser.h"
-#include "wine/unicode.h"
 #include "sddl.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(msi);
@@ -273,10 +272,10 @@ UINT WINAPI MsiSourceListEnumMediaDisksW(LPCWSTR szProductCodeOrPatchCode,
         goto done;
 
     if (pdwDiskId)
-        *pdwDiskId = atolW(value);
+        *pdwDiskId = wcstol(value, NULL, 10);
 
     ptr2 = data;
-    ptr = strchrW(data, ';');
+    ptr = wcschr(data, ';');
     if (!ptr)
         ptr = data;
     else
@@ -286,7 +285,7 @@ UINT WINAPI MsiSourceListEnumMediaDisksW(LPCWSTR szProductCodeOrPatchCode,
     {
         if (type == REG_DWORD)
         {
-            sprintfW(convert, fmt, *data);
+            swprintf(convert, ARRAY_SIZE(convert), fmt, *data);
             size = lstrlenW(convert);
             ptr2 = convert;
         }
@@ -308,7 +307,7 @@ UINT WINAPI MsiSourceListEnumMediaDisksW(LPCWSTR szProductCodeOrPatchCode,
 
         if (type == REG_DWORD)
         {
-            sprintfW(convert, fmt, *ptr);
+            swprintf(convert, ARRAY_SIZE(convert), fmt, *ptr);
             size = lstrlenW(convert);
             ptr = convert;
         }
@@ -459,7 +458,7 @@ UINT WINAPI MsiSourceListEnumSourcesW(LPCWSTR szProductCodeOrPatch, LPCWSTR szUs
         goto done;
     }
 
-    sprintfW(name, format, dwIndex + 1);
+    swprintf(name, ARRAY_SIZE(name), format, dwIndex + 1);
 
     res = RegQueryValueExW(subkey, name, 0, 0, (LPBYTE)szSource, pcchSource);
     if (res != ERROR_SUCCESS && res != ERROR_MORE_DATA)
@@ -569,8 +568,8 @@ UINT WINAPI MsiSourceListGetInfoW( LPCWSTR szProduct, LPCWSTR szUserSid,
     if (rc != ERROR_SUCCESS)
         return rc;
 
-    if (!strcmpW( szProperty, INSTALLPROPERTY_MEDIAPACKAGEPATHW ) ||
-        !strcmpW( szProperty, INSTALLPROPERTY_DISKPROMPTW ))
+    if (!wcscmp( szProperty, INSTALLPROPERTY_MEDIAPACKAGEPATHW ) ||
+        !wcscmp( szProperty, INSTALLPROPERTY_DISKPROMPTW ))
     {
         rc = OpenMediaSubkey(sourcekey, &media, FALSE);
         if (rc != ERROR_SUCCESS)
@@ -579,14 +578,14 @@ UINT WINAPI MsiSourceListGetInfoW( LPCWSTR szProduct, LPCWSTR szUserSid,
             return ERROR_SUCCESS;
         }
 
-        if (!strcmpW( szProperty, INSTALLPROPERTY_MEDIAPACKAGEPATHW ))
+        if (!wcscmp( szProperty, INSTALLPROPERTY_MEDIAPACKAGEPATHW ))
             szProperty = mediapack;
 
         RegQueryValueExW(media, szProperty, 0, 0, (LPBYTE)szValue, pcchValue);
         RegCloseKey(media);
     }
-    else if (!strcmpW( szProperty, INSTALLPROPERTY_LASTUSEDSOURCEW ) ||
-             !strcmpW( szProperty, INSTALLPROPERTY_LASTUSEDTYPEW ))
+    else if (!wcscmp( szProperty, INSTALLPROPERTY_LASTUSEDSOURCEW ) ||
+             !wcscmp( szProperty, INSTALLPROPERTY_LASTUSEDTYPEW ))
     {
         rc = RegQueryValueExW(sourcekey, INSTALLPROPERTY_LASTUSEDSOURCEW,
                               0, 0, NULL, &size);
@@ -610,7 +609,7 @@ UINT WINAPI MsiSourceListGetInfoW( LPCWSTR szProduct, LPCWSTR szUserSid,
             return ERROR_SUCCESS;
         }
 
-        if (!strcmpW( szProperty, INSTALLPROPERTY_LASTUSEDTYPEW ))
+        if (!wcscmp( szProperty, INSTALLPROPERTY_LASTUSEDTYPEW ))
         {
             if (*source != 'n' && *source != 'u' && *source != 'm')
             {
@@ -624,7 +623,7 @@ UINT WINAPI MsiSourceListGetInfoW( LPCWSTR szProduct, LPCWSTR szUserSid,
         }
         else
         {
-            ptr = strrchrW(source, ';');
+            ptr = wcsrchr(source, ';');
             if (!ptr)
                 ptr = source;
             else
@@ -633,7 +632,7 @@ UINT WINAPI MsiSourceListGetInfoW( LPCWSTR szProduct, LPCWSTR szUserSid,
 output_out:
         if (szValue)
         {
-            if (strlenW(ptr) < *pcchValue)
+            if (lstrlenW(ptr) < *pcchValue)
                 lstrcpyW(szValue, ptr);
             else
                 rc = ERROR_MORE_DATA;
@@ -642,7 +641,7 @@ output_out:
         *pcchValue = lstrlenW(ptr);
         msi_free(source);
     }
-    else if (!strcmpW( szProperty, INSTALLPROPERTY_PACKAGENAMEW ))
+    else if (!wcscmp( szProperty, INSTALLPROPERTY_PACKAGENAMEW ))
     {
         *pcchValue = *pcchValue * sizeof(WCHAR);
         rc = RegQueryValueExW(sourcekey, INSTALLPROPERTY_PACKAGENAMEW, 0, 0,
@@ -737,8 +736,8 @@ UINT msi_set_last_used_source(LPCWSTR product, LPCWSTR usersid,
             return r;
     }
 
-    size = (lstrlenW(format) + lstrlenW(value) + 7) * sizeof(WCHAR);
-    buffer = msi_alloc(size);
+    size = lstrlenW(format) + lstrlenW(value) + 7;
+    buffer = msi_alloc(size * sizeof(WCHAR));
     if (!buffer)
         return ERROR_OUTOFMEMORY;
 
@@ -749,7 +748,7 @@ UINT msi_set_last_used_source(LPCWSTR product, LPCWSTR usersid,
         return r;
     }
 
-    sprintfW(buffer, format, typechar, index, value);
+    swprintf(buffer, size, format, typechar, index, value);
 
     size = (lstrlenW(buffer) + 1) * sizeof(WCHAR);
     r = RegSetValueExW(source, INSTALLPROPERTY_LASTUSEDSOURCEW, 0,
@@ -795,22 +794,22 @@ UINT WINAPI MsiSourceListSetInfoW( LPCWSTR szProduct, LPCWSTR szUserSid,
     }
 
     property = szProperty;
-    if (!strcmpW( szProperty, INSTALLPROPERTY_MEDIAPACKAGEPATHW ))
+    if (!wcscmp( szProperty, INSTALLPROPERTY_MEDIAPACKAGEPATHW ))
         property = media_package;
 
     rc = OpenSourceKey(szProduct, &sourcekey, MSICODE_PRODUCT, dwContext, FALSE);
     if (rc != ERROR_SUCCESS)
         return rc;
 
-    if (strcmpW( szProperty, INSTALLPROPERTY_LASTUSEDSOURCEW ) &&
+    if (wcscmp( szProperty, INSTALLPROPERTY_LASTUSEDSOURCEW ) &&
         dwOptions & (MSISOURCETYPE_NETWORK | MSISOURCETYPE_URL))
     {
         RegCloseKey(sourcekey);
         return ERROR_INVALID_PARAMETER;
     }
 
-    if (!strcmpW( szProperty, INSTALLPROPERTY_MEDIAPACKAGEPATHW ) ||
-        !strcmpW( szProperty, INSTALLPROPERTY_DISKPROMPTW ))
+    if (!wcscmp( szProperty, INSTALLPROPERTY_MEDIAPACKAGEPATHW ) ||
+        !wcscmp( szProperty, INSTALLPROPERTY_DISKPROMPTW ))
     {
         rc = OpenMediaSubkey(sourcekey, &media, TRUE);
         if (rc == ERROR_SUCCESS)
@@ -819,7 +818,7 @@ UINT WINAPI MsiSourceListSetInfoW( LPCWSTR szProduct, LPCWSTR szUserSid,
             RegCloseKey(media);
         }
     }
-    else if (!strcmpW( szProperty, INSTALLPROPERTY_PACKAGENAMEW ))
+    else if (!wcscmp( szProperty, INSTALLPROPERTY_PACKAGENAMEW ))
     {
         DWORD size = (lstrlenW(szValue) + 1) * sizeof(WCHAR);
         rc = RegSetValueExW(sourcekey, INSTALLPROPERTY_PACKAGENAMEW, 0,
@@ -827,7 +826,7 @@ UINT WINAPI MsiSourceListSetInfoW( LPCWSTR szProduct, LPCWSTR szUserSid,
         if (rc != ERROR_SUCCESS)
             rc = ERROR_UNKNOWN_PROPERTY;
     }
-    else if (!strcmpW( szProperty, INSTALLPROPERTY_LASTUSEDSOURCEW ))
+    else if (!wcscmp( szProperty, INSTALLPROPERTY_LASTUSEDSOURCEW ))
     {
         if (!(dwOptions & (MSISOURCETYPE_NETWORK | MSISOURCETYPE_URL)))
             rc = ERROR_INVALID_PARAMETER;
@@ -989,7 +988,7 @@ static void add_source_to_list(struct list *sourcelist, media_info *info,
 
         /* update the rest of the list */
         if (found)
-            sprintfW(iter->szIndex, fmt, ++iter->index);
+            swprintf(iter->szIndex, ARRAY_SIZE(iter->szIndex), fmt, ++iter->index);
         else if (index)
             (*index)++;
     }
@@ -1027,7 +1026,7 @@ static UINT fill_source_list(struct list *sourcelist, HKEY sourcekey, DWORD *cou
         }
 
         lstrcpyW(entry->szIndex, name);
-        entry->index = atoiW(name);
+        entry->index = wcstol(name, NULL, 10);
 
         size++;
         r = RegEnumValueW(sourcekey, index, name, &size, NULL,
@@ -1134,13 +1133,13 @@ UINT WINAPI MsiSourceListAddSourceExW( LPCWSTR szProduct, LPCWSTR szUserSid,
     }
     else if (dwIndex > count || dwIndex == 0)
     {
-        sprintfW(name, fmt, count + 1);
+        swprintf(name, ARRAY_SIZE(name), fmt, count + 1);
         rc = RegSetValueExW(typekey, name, 0, REG_EXPAND_SZ, (LPBYTE)source, size);
         goto done;
     }
     else
     {
-        sprintfW(name, fmt, dwIndex);
+        swprintf(name, ARRAY_SIZE(name), fmt, dwIndex);
         info = msi_alloc(sizeof(media_info));
         if (!info)
         {
@@ -1244,7 +1243,7 @@ UINT WINAPI MsiSourceListAddMediaDiskW(LPCWSTR szProduct, LPCWSTR szUserSid,
 
     OpenMediaSubkey(sourcekey, &mediakey, TRUE);
 
-    sprintfW(szIndex, fmt, dwDiskId);
+    swprintf(szIndex, ARRAY_SIZE(szIndex), fmt, dwDiskId);
 
     size = 2;
     if (szVolumeLabel) size += lstrlenW(szVolumeLabel);
diff --git a/dll/win32/msi/sql.y b/dll/win32/msi/sql.y
index 2101c680eb3..50092abacf9 100644
--- a/dll/win32/msi/sql.y
+++ b/dll/win32/msi/sql.y
@@ -20,9 +20,6 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */
 
-
-#include "config.h"
-
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -32,7 +29,6 @@
 #include "query.h"
 #include "wine/list.h"
 #include "wine/debug.h"
-#include "wine/unicode.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(msi);
 
@@ -746,15 +742,15 @@ number:
 static LPWSTR parser_add_table( void *info, LPCWSTR list, LPCWSTR table )
 {
     static const WCHAR space[] = {' ',0};
-    DWORD len = strlenW( list ) + strlenW( table ) + 2;
+    DWORD len = lstrlenW( list ) + lstrlenW( table ) + 2;
     LPWSTR ret;
 
     ret = parser_alloc( info, len * sizeof(WCHAR) );
     if( ret )
     {
-        strcpyW( ret, list );
-        strcatW( ret, space );
-        strcatW( ret, table );
+        lstrcpyW( ret, list );
+        lstrcatW( ret, space );
+        lstrcatW( ret, table );
     }
     return ret;
 }
@@ -978,7 +974,7 @@ static BOOL SQL_MarkPrimaryKeys( column_info **cols,
         found = FALSE;
         for( c = *cols, idx = 0; c && !found; c = c->next, idx++ )
         {
-            if( strcmpW( k->column, c->column ) )
+            if( wcscmp( k->column, c->column ) )
                 continue;
             c->type |= MSITYPE_KEY;
             found = TRUE;
diff --git a/dll/win32/msi/streams.c b/dll/win32/msi/streams.c
index 777eb98cffa..6f8a436b5e4 100644
--- a/dll/win32/msi/streams.c
+++ b/dll/win32/msi/streams.c
@@ -33,7 +33,6 @@
 #include "query.h"
 
 #include "wine/debug.h"
-#include "wine/unicode.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(msidb);
 
@@ -615,7 +614,7 @@ UINT msi_commit_streams( MSIDATABASE *db )
     for (i = 0; i < db->num_streams; i++)
     {
         name = msi_string_lookup( db->strings, db->streams[i].str_index, NULL );
-        if (!strcmpW( name, szSumInfo )) continue;
+        if (!wcscmp( name, szSumInfo )) continue;
 
         if (!(encname = encode_streamname( FALSE, name ))) return ERROR_OUTOFMEMORY;
         TRACE("saving stream %s as %s\n", debugstr_w(name), debugstr_w(encname));
diff --git a/dll/win32/msi/string.c b/dll/win32/msi/string.c
index 9dec32d73fe..5c6432ba1ed 100644
--- a/dll/win32/msi/string.c
+++ b/dll/win32/msi/string.c
@@ -29,7 +29,6 @@
 #include "winbase.h"
 #include "winerror.h"
 #include "wine/debug.h"
-#include "wine/unicode.h"
 #include "msi.h"
 #include "msiquery.h"
 #include "objbase.h"
@@ -311,7 +310,7 @@ int msi_add_string( string_table *st, const WCHAR *data, int len, BOOL persisten
     if( !data )
         return 0;
 
-    if (len < 0) len = strlenW( data );
+    if (len < 0) len = lstrlenW( data );
 
     if( !data[0] && !len )
         return 0;
@@ -404,7 +403,7 @@ UINT msi_string2id( const string_table *st, const WCHAR *str, int len, UINT *id
 {
     int i, c, low = 0, high = st->sortcount - 1;
 
-    if (len < 0) len = strlenW( str );
+    if (len < 0) len = lstrlenW( str );
 
     while (low <= high)
     {
diff --git a/dll/win32/msi/suminfo.c b/dll/win32/msi/suminfo.c
index d590ad46f68..666bb1ea1ae 100644
--- a/dll/win32/msi/suminfo.c
+++ b/dll/win32/msi/suminfo.c
@@ -31,7 +31,6 @@
 #include "shlwapi.h"
 #include "wine/debug.h"
 #include "wine/exception.h"
-#include "wine/unicode.h"
 #include "msi.h"
 #include "msiquery.h"
 #include "msidefs.h"
@@ -999,31 +998,31 @@ static void parse_filetime( LPCWSTR str, FILETIME *ft )
 
     /* YYYY/MM/DD hh:mm:ss */
 
-    while (isspaceW( *p )) p++;
+    while (iswspace( *p )) p++;
 
-    lt.wYear = strtolW( p, &end, 10 );
+    lt.wYear = wcstol( p, &end, 10 );
     if (*end != '/') return;
     p = end + 1;
 
-    lt.wMonth = strtolW( p, &end, 10 );
+    lt.wMonth = wcstol( p, &end, 10 );
     if (*end != '/') return;
     p = end + 1;
 
-    lt.wDay = strtolW( p, &end, 10 );
+    lt.wDay = wcstol( p, &end, 10 );
     if (*end != ' ') return;
     p = end + 1;
 
-    while (isspaceW( *p )) p++;
+    while (iswspace( *p )) p++;
 
-    lt.wHour = strtolW( p, &end, 10 );
+    lt.wHour = wcstol( p, &end, 10 );
     if (*end != ':') return;
     p = end + 1;
 
-    lt.wMinute = strtolW( p, &end, 10 );
+    lt.wMinute = wcstol( p, &end, 10 );
     if (*end != ':') return;
     p = end + 1;
 
-    lt.wSecond = strtolW( p, &end, 10 );
+    lt.wSecond = wcstol( p, &end, 10 );
 
     TzSpecificLocalTimeToSystemTime( NULL, &lt, &utc );
     SystemTimeToFileTime( &utc, ft );
@@ -1032,7 +1031,7 @@ static void parse_filetime( LPCWSTR str, FILETIME *ft )
 static UINT parse_prop( LPCWSTR prop, LPCWSTR value, UINT *pid, INT *int_value,
                         FILETIME *ft_value, awcstring *str_value )
 {
-    *pid = atoiW( prop );
+    *pid = wcstol( prop, NULL, 10);
     switch (*pid)
     {
 #ifdef __REACTOS__
@@ -1048,7 +1047,7 @@ static UINT parse_prop( LPCWSTR prop, LPCWSTR value, UINT *pid, INT *int_value,
     case PID_SECURITY:
 #endif
     case PID_PAGECOUNT:
-        *int_value = atoiW( value );
+        *int_value = wcstol( value, NULL, 10);
         break;
 
     case PID_LASTPRINTED:
diff --git a/dll/win32/msi/table.c b/dll/win32/msi/table.c
index 57114baa749..c0ffa99e1d6 100644
--- a/dll/win32/msi/table.c
+++ b/dll/win32/msi/table.c
@@ -35,7 +35,6 @@
 #include "query.h"
 
 #include "wine/debug.h"
-#include "wine/unicode.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(msidb);
 
@@ -493,7 +492,7 @@ static MSITABLE *find_cached_table( MSIDATABASE *db, LPCWSTR name )
     MSITABLE *t;
 
     LIST_FOR_EACH_ENTRY( t, &db->tables, MSITABLE, entry )
-        if( !strcmpW( name, t->name ) )
+        if( !wcscmp( name, t->name ) )
             return t;
 
     return NULL;
@@ -523,12 +522,12 @@ static UINT get_defaulttablecolumns( MSIDATABASE *db, LPCWSTR name, MSICOLUMNINF
 
     TRACE("%s\n", debugstr_w(name));
 
-    if (!strcmpW( name, szTables ))
+    if (!wcscmp( name, szTables ))
     {
         p = _Tables_cols;
         n = 1;
     }
-    else if (!strcmpW( name, szColumns ))
+    else if (!wcscmp( name, szColumns ))
     {
         p = _Columns_cols;
         n = 4;
@@ -606,7 +605,7 @@ static UINT get_table( MSIDATABASE *db, LPCWSTR name, MSITABLE **table_ret )
     table->persistent = MSICONDITION_TRUE;
     lstrcpyW( table->name, name );
 
-    if (!strcmpW( name, szTables ) || !strcmpW( name, szColumns ))
+    if (!wcscmp( name, szTables ) || !wcscmp( name, szColumns ))
         table->persistent = MSICONDITION_NONE;
 
     r = table_get_column_info( db, name, &table->colinfo, &table->col_count );
@@ -972,8 +971,8 @@ BOOL TABLE_Exists( MSIDATABASE *db, LPCWSTR name )
     UINT r, table_id, i;
     MSITABLE *table;
 
-    if( !strcmpW( name, szTables ) || !strcmpW( name, szColumns ) ||
-        !strcmpW( name, szStreams ) || !strcmpW( name, szStorages ) )
+    if( !wcscmp( name, szTables ) || !wcscmp( name, szColumns ) ||
+        !wcscmp( name, szStreams ) || !wcscmp( name, szStorages ) )
         return TRUE;
 
     r = msi_string2id( db->strings, name, -1, &table_id );
@@ -1097,10 +1096,10 @@ static UINT get_stream_name( const MSITABLEVIEW *tv, UINT row, WCHAR **pstname )
                 switch( n )
                 {
                 case 2:
-                    sprintfW( number, fmt, ival-0x8000 );
+                    swprintf( number, ARRAY_SIZE(number), fmt, ival-0x8000 );
                     break;
                 case 4:
-                    sprintfW( number, fmt, ival^0x80000000 );
+                    swprintf( number, ARRAY_SIZE(number), fmt, ival^0x80000000 );
                     break;
                 default:
                     ERR( "oops - unknown column width %d\n", n );
@@ -2063,7 +2062,7 @@ static UINT TABLE_add_column(struct tagMSIVIEW *view, LPCWSTR table, UINT number
     msitable = find_cached_table(tv->db, table);
     for (i = 0; i < msitable->col_count; i++)
     {
-        if (!strcmpW( msitable->colinfo[i].colname, column ))
+        if (!wcscmp( msitable->colinfo[i].colname, column ))
         {
             InterlockedIncrement(&msitable->colinfo[i].ref_count);
             break;
@@ -2154,9 +2153,9 @@ UINT TABLE_CreateView( MSIDATABASE *db, LPCWSTR name, MSIVIEW **view )
 
     TRACE("%p %s %p\n", db, debugstr_w(name), view );
 
-    if ( !strcmpW( name, szStreams ) )
+    if ( !wcscmp( name, szStreams ) )
         return STREAMS_CreateView( db, view );
-    else if ( !strcmpW( name, szStorages ) )
+    else if ( !wcscmp( name, szStorages ) )
         return STORAGES_CreateView( db, view );
 
     sz = FIELD_OFFSET( MSITABLEVIEW, name[lstrlenW( name ) + 1] );
@@ -2615,7 +2614,7 @@ static UINT msi_table_load_transform( MSIDATABASE *db, IStorage *stg,
             UINT number = MSI_NULL_INTEGER;
             UINT row = 0;
 
-            if (!strcmpW( name, szColumns ))
+            if (!wcscmp( name, szColumns ))
             {
                 MSI_RecordGetStringW( rec, 1, table, &sz );
                 number = MSI_RecordGetInteger( rec, 2 );
@@ -2627,7 +2626,7 @@ static UINT msi_table_load_transform( MSIDATABASE *db, IStorage *stg,
                 if ( number == MSI_NULL_INTEGER )
                 {
                     /* reset the column number on a new table */
-                    if (strcmpW( coltable, table ))
+                    if (wcscmp( coltable, table ))
                     {
                         colcol = 0;
                         lstrcpyW( coltable, table );
@@ -2673,7 +2672,7 @@ static UINT msi_table_load_transform( MSIDATABASE *db, IStorage *stg,
                     WARN("failed to insert row %u\n", r);
             }
 
-            if (!strcmpW( name, szColumns ))
+            if (!wcscmp( name, szColumns ))
                 msi_update_table_columns( db, table );
 
             msiobj_release( &rec->hdr );
@@ -2736,8 +2735,8 @@ UINT msi_table_apply_transform( MSIDATABASE *db, IStorage *stg )
         if ( name[0] != 0x4840 )
             continue;
 
-        if ( !strcmpW( name+1, szStringPool ) ||
-             !strcmpW( name+1, szStringData ) )
+        if ( !wcscmp( name+1, szStringPool ) ||
+             !wcscmp( name+1, szStringData ) )
             continue;
 
         transform = msi_alloc_zero( sizeof(TRANSFORMDATA) );
@@ -2748,11 +2747,11 @@ UINT msi_table_apply_transform( MSIDATABASE *db, IStorage *stg )
 
         transform->name = strdupW( name + 1 );
 
-        if ( !strcmpW( transform->name, szTables ) )
+        if ( !wcscmp( transform->name, szTables ) )
             tables = transform;
-        else if (!strcmpW( transform->name, szColumns ) )
+        else if (!wcscmp( transform->name, szColumns ) )
             columns = transform;
-        else if (!strcmpW( transform->name, szProperty ))
+        else if (!wcscmp( transform->name, szProperty ))
             property_update = TRUE;
 
         TRACE("transform contains stream %s\n", debugstr_w(name));
@@ -2788,8 +2787,8 @@ UINT msi_table_apply_transform( MSIDATABASE *db, IStorage *stg )
     {
         transform = LIST_ENTRY( list_head( &transforms ), TRANSFORMDATA, entry );
 
-        if ( strcmpW( transform->name, szColumns ) &&
-             strcmpW( transform->name, szTables ) &&
+        if ( wcscmp( transform->name, szColumns ) &&
+             wcscmp( transform->name, szTables ) &&
              ret == ERROR_SUCCESS )
         {
             ret = msi_table_load_transform( db, stg, strings, transform, bytes_per_strref );
diff --git a/dll/win32/msi/tokenize.c b/dll/win32/msi/tokenize.c
index e429495ae17..4ebc9b81fb4 100644
--- a/dll/win32/msi/tokenize.c
+++ b/dll/win32/msi/tokenize.c
@@ -22,7 +22,6 @@
 
 #include "windef.h"
 #include "winbase.h"
-#include "wine/unicode.h"
 #include "query.h"
 #include "sql.tab.h"
 
@@ -124,11 +123,11 @@ static const Keyword aKeywordTable[] = {
 /*
 ** Comparison function for binary search.
 */
-static int compKeyword(const void *m1, const void *m2){
+static int __cdecl compKeyword(const void *m1, const void *m2){
   const Keyword *k1 = m1, *k2 = m2;
   int ret, len = min( k1->len, k2->len );
 
-  if ((ret = strncmpiW( k1->name, k2->name, len ))) return ret;
+  if ((ret = wcsnicmp( k1->name, k2->name, len ))) return ret;
   if (k1->len < k2->len) return -1;
   else if (k1->len > k2->len) return 1;
   return 0;
diff --git a/dll/win32/msi/upgrade.c b/dll/win32/msi/upgrade.c
index 034d891c1f9..60b5c74f40b 100644
--- a/dll/win32/msi/upgrade.c
+++ b/dll/win32/msi/upgrade.c
@@ -36,7 +36,6 @@
 #include "msidefs.h"
 #include "msipriv.h"
 #include "winuser.h"
-#include "wine/unicode.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(msi);
 
@@ -47,7 +46,7 @@ static BOOL check_language(DWORD lang1, LPCWSTR lang2, DWORD attributes)
     if (!lang2 || lang2[0]==0)
         return TRUE;
 
-    langdword = atoiW(lang2);
+    langdword = wcstol(lang2, NULL, 10);
 
     if (attributes & msidbUpgradeAttributesLanguagesExclusive)
         return (lang1 != langdword);
@@ -68,7 +67,7 @@ static BOOL find_product( const WCHAR *list, const WCHAR *product )
         while (*q && *q != '}') q++;
         if (*q != '}') return FALSE;
         q++;
-        if (q - p < strlenW( product )) return FALSE;
+        if (q - p < lstrlenW( product )) return FALSE;
         if (!memcmp( p, product, (q - p) * sizeof(WCHAR) )) return TRUE;
         p = q + 1;
         while (*p && *p != ';') p++;
@@ -92,19 +91,19 @@ static void append_productcode( MSIPACKAGE *package, const WCHAR *action_prop, c
         return;
     }
 
-    if (prop) len += strlenW( prop );
-    len += strlenW( product ) + 2;
+    if (prop) len += lstrlenW( prop );
+    len += lstrlenW( product ) + 2;
     if (!(newprop = msi_alloc( len * sizeof(WCHAR) ))) return;
     if (prop)
     {
-        strcpyW( newprop, prop );
-        strcatW( newprop, szSemiColon );
+        lstrcpyW( newprop, prop );
+        lstrcatW( newprop, szSemiColon );
     }
     else newprop[0] = 0;
-    strcatW( newprop, product );
+    lstrcatW( newprop, product );
 
     r = msi_set_property( package->db, action_prop, newprop, -1 );
-    if (r == ERROR_SUCCESS && !strcmpW( action_prop, szSourceDir ))
+    if (r == ERROR_SUCCESS && !wcscmp( action_prop, szSourceDir ))
         msi_reset_source_folders( package );
 
     TRACE( "related product property %s now %s\n", debugstr_w(action_prop), debugstr_w(newprop) );
diff --git a/dll/win32/msi/where.c b/dll/win32/msi/where.c
index 66de85bec94..07064f0f980 100644
--- a/dll/win32/msi/where.c
+++ b/dll/win32/msi/where.c
@@ -26,7 +26,6 @@
 #include "winbase.h"
 #include "winerror.h"
 #include "wine/debug.h"
-#include "wine/unicode.h"
 #include "msi.h"
 #include "msiquery.h"
 #include "objbase.h"
@@ -187,7 +186,7 @@ static UINT parse_column(MSIWHEREVIEW *wv, union ext_column *column,
                                                   NULL, &table_name);
             if (r != ERROR_SUCCESS)
                 return r;
-            if (strcmpW(table_name, column->unparsed.table) != 0)
+            if (wcscmp(table_name, column->unparsed.table) != 0)
                 continue;
         }
 
@@ -200,7 +199,7 @@ static UINT parse_column(MSIWHEREVIEW *wv, union ext_column *column,
             if(r != ERROR_SUCCESS )
                 return r;
 
-            if(strcmpW(col_name, column->unparsed.column))
+            if(wcscmp(col_name, column->unparsed.column))
                 continue;
             column->parsed.column = i;
             column->parsed.table = table;
@@ -587,7 +586,7 @@ static UINT STRCMP_Evaluate( MSIWHEREVIEW *wv, const UINT rows[], const struct c
     else if( r_str && ! l_str )
         sr = -1;
     else
-        sr = strcmpW( l_str, r_str );
+        sr = wcscmp( l_str, r_str );
 
     *val = ( expr->op == OP_EQ && ( sr == 0 ) ) ||
            ( expr->op == OP_NE && ( sr != 0 ) );
@@ -682,7 +681,7 @@ static UINT check_condition( MSIWHEREVIEW *wv, MSIRECORD *record, JOINTABLE **ta
     return r;
 }
 
-static int compare_entry( const void *left, const void *right )
+static int __cdecl compare_entry( const void *left, const void *right )
 {
     const MSIROWENTRY *le = *(const MSIROWENTRY**)left;
     const MSIROWENTRY *re = *(const MSIROWENTRY**)right;
@@ -1247,7 +1246,7 @@ UINT WHERE_CreateView( MSIDATABASE *db, MSIVIEW **view, LPWSTR tables,
     {
         JOINTABLE *table;
 
-        if ((ptr = strchrW(tables, ' ')))
+        if ((ptr = wcschr(tables, ' ')))
             *ptr = '\0';
 
         table = msi_alloc(sizeof(JOINTABLE));