diff --git a/reactos/base/applications/regedit/childwnd.c b/reactos/base/applications/regedit/childwnd.c
index 29b0d2bc94e..4894afa5503 100644
--- a/reactos/base/applications/regedit/childwnd.c
+++ b/reactos/base/applications/regedit/childwnd.c
@@ -67,7 +67,8 @@ static void draw_splitbar(HWND hWnd, int x)
 static void ResizeWnd(ChildWnd* pChildWnd, int cx, int cy)
 {
     HDWP hdwp = BeginDeferWindowPos(2);
-    RECT rt = {0, 0, cx, cy};
+    RECT rt;
+    SetRect(&rt, 0, 0, cx, cy);
 
     cx = pChildWnd->nSplitPos + SPLIT_WIDTH/2;
     DeferWindowPos(hdwp, pChildWnd->hTreeWnd, 0, rt.left, rt.top, pChildWnd->nSplitPos-SPLIT_WIDTH/2-rt.left, rt.bottom-rt.top, SWP_NOZORDER|SWP_NOACTIVATE);
@@ -103,6 +104,8 @@ static BOOL _CmdWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
     LPCTSTR keyPath, s;
     WORD wID = LOWORD(wParam);
 
+    UNREFERENCED_PARAMETER(message);
+
     switch (wID) {
         /* Parse the menu selections: */
     case ID_REGISTRY_EXIT:
@@ -209,12 +212,12 @@ static void SuggestKeys(HKEY hRootKey, LPCTSTR pszKeyPath, LPTSTR pszSuggestions
 				{
 					if (RegOpenKey(hRootKey, szBuffer, &hOtherKey) == ERROR_SUCCESS)
 					{
-						lstrcpyn(pszSuggestions, TEXT("HKCR\\"), iSuggestionsLength);
+						lstrcpyn(pszSuggestions, TEXT("HKCR\\"), (int) iSuggestionsLength);
 						i = _tcslen(pszSuggestions);
 						pszSuggestions += i;
 	    				iSuggestionsLength -= i;
 
-						lstrcpyn(pszSuggestions, szBuffer, iSuggestionsLength);
+						lstrcpyn(pszSuggestions, szBuffer, (int) iSuggestionsLength);
 						i = MIN(_tcslen(pszSuggestions) + 1, iSuggestionsLength);
 						pszSuggestions += i;
 						iSuggestionsLength -= i;
@@ -235,12 +238,12 @@ static void SuggestKeys(HKEY hRootKey, LPCTSTR pszKeyPath, LPTSTR pszSuggestions
 			if (RegQueryStringValue(hSubKey, TEXT("CLSID"), NULL,
 				szBuffer, sizeof(szBuffer) / sizeof(szBuffer[0])) == ERROR_SUCCESS)
 			{
-				lstrcpyn(pszSuggestions, TEXT("HKCR\\CLSID\\"), iSuggestionsLength);
+				lstrcpyn(pszSuggestions, TEXT("HKCR\\CLSID\\"), (int) iSuggestionsLength);
 				i = _tcslen(pszSuggestions);
 				pszSuggestions += i;
 				iSuggestionsLength -= i;
 
-				lstrcpyn(pszSuggestions, szBuffer, iSuggestionsLength);
+				lstrcpyn(pszSuggestions, szBuffer, (int) iSuggestionsLength);
 				i = MIN(_tcslen(pszSuggestions) + 1, iSuggestionsLength);
 				pszSuggestions += i;
 				iSuggestionsLength -= i;
@@ -263,7 +266,7 @@ static void SuggestKeys(HKEY hRootKey, LPCTSTR pszKeyPath, LPTSTR pszSuggestions
  */
 LRESULT CALLBACK ChildWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
 {
-    static short last_split;
+    static int last_split;
     BOOL Result;
     ChildWnd* pChildWnd = g_pChildWnd;
 
@@ -432,7 +435,7 @@ LRESULT CALLBACK ChildWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lPa
 			        	_T("Software\\Microsoft\\Windows\\CurrentVersion\\Applets\\Regedit"),
 			    	    &hKey) == ERROR_SUCCESS)
 			    	{
-			    	    RegSetValueEx(hKey, _T("LastKey"), 0, REG_SZ, (LPBYTE) szBuffer, _tcslen(szBuffer) * sizeof(szBuffer[0]));
+			    	    RegSetValueEx(hKey, _T("LastKey"), 0, REG_SZ, (LPBYTE) szBuffer, (DWORD) _tcslen(szBuffer) * sizeof(szBuffer[0]));
 			    	    RegCloseKey(hKey);
 			    	}
 			    }
diff --git a/reactos/base/applications/regedit/edit.c b/reactos/base/applications/regedit/edit.c
index cc30cf5ae23..c1b6a8819db 100644
--- a/reactos/base/applications/regedit/edit.c
+++ b/reactos/base/applications/regedit/edit.c
@@ -103,6 +103,8 @@ INT_PTR CALLBACK modify_string_dlgproc(HWND hwndDlg, UINT uMsg, WPARAM wParam, L
     HWND hwndValue;
     int len;
 
+    UNREFERENCED_PARAMETER(lParam);
+
     switch(uMsg) {
     case WM_INITDIALOG:
         if(editValueName && _tcscmp(editValueName, _T("")))
@@ -168,6 +170,8 @@ INT_PTR CALLBACK modify_multi_string_dlgproc(HWND hwndDlg, UINT uMsg, WPARAM wPa
     HWND hwndValue;
     int len;
 
+    UNREFERENCED_PARAMETER(lParam);
+
     switch(uMsg) {
     case WM_INITDIALOG:
         if(editValueName && _tcscmp(editValueName, _T("")))
@@ -238,7 +242,7 @@ LRESULT CALLBACK DwordEditSubclassProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPAR
     case WM_CHAR:
         if (dwordEditMode == EDIT_MODE_DEC)
         {
-            if (isdigit(wParam & 0xff))
+            if (isdigit((int) wParam & 0xff))
             {
                 break;
             }
@@ -249,7 +253,7 @@ LRESULT CALLBACK DwordEditSubclassProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPAR
         }
         else if (dwordEditMode == EDIT_MODE_HEX)
         {
-            if (isxdigit(wParam & 0xff))
+            if (isxdigit((int) wParam & 0xff))
             {
                 break;
             }
@@ -278,6 +282,8 @@ INT_PTR CALLBACK modify_dword_dlgproc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LP
     DWORD Base;
     DWORD Value = 0;
 
+    UNREFERENCED_PARAMETER(lParam);
+
     switch(uMsg) {
     case WM_INITDIALOG:
         dwordEditMode = EDIT_MODE_HEX;
@@ -384,6 +390,8 @@ INT_PTR CALLBACK modify_binary_dlgproc(HWND hwndDlg, UINT uMsg, WPARAM wParam, L
     HWND hwndValue;
     UINT len;
 
+    UNREFERENCED_PARAMETER(lParam);
+
     switch(uMsg) {
     case WM_INITDIALOG:
         if(editValueName && _tcscmp(editValueName, _T("")))
@@ -408,7 +416,7 @@ INT_PTR CALLBACK modify_binary_dlgproc(HWND hwndDlg, UINT uMsg, WPARAM wParam, L
         case IDOK:
             if ((hwndValue = GetDlgItem(hwndDlg, IDC_VALUE_DATA)))
             {
-                len = HexEdit_GetBufferSize(hwndValue);
+                len = (UINT) HexEdit_GetBufferSize(hwndValue);
                 if (len != valueDataLen && len > 0)
                 {
                     binValueData = HeapReAlloc(GetProcessHeap(), 0, binValueData, len);
@@ -482,7 +490,7 @@ BOOL ModifyValue(HWND hwnd, HKEY hKey, LPCTSTR valueName, BOOL EditBin)
         {
             if (stringValueData)
             {
-                lRet = RegSetValueEx(hKey, valueName, 0, type, (LPBYTE)stringValueData, (_tcslen(stringValueData) + 1) * sizeof(TCHAR));
+                lRet = RegSetValueEx(hKey, valueName, 0, type, (LPBYTE)stringValueData, (DWORD) (_tcslen(stringValueData) + 1) * sizeof(TCHAR));
             }
             else
             {
@@ -496,7 +504,7 @@ BOOL ModifyValue(HWND hwnd, HKEY hKey, LPCTSTR valueName, BOOL EditBin)
     {
         if (valueDataLen > 0)
         {
-            DWORD llen, listlen, nl_len;
+            size_t llen, listlen, nl_len;
             LPTSTR src, lines = NULL;
 
 	    if (!(stringValueData = HeapAlloc(GetProcessHeap(), 0, valueDataLen)))
@@ -542,7 +550,7 @@ BOOL ModifyValue(HWND hwnd, HKEY hKey, LPCTSTR valueName, BOOL EditBin)
                 /* convert \r\n to \0 */
                 BOOL EmptyLines = FALSE;
                 LPTSTR src, lines, nl;
-                DWORD linechars, buflen, c_nl, dest;
+                size_t linechars, buflen, c_nl, dest;
 
                 src = stringValueData;
                 buflen = sizeof(TCHAR);
@@ -586,7 +594,7 @@ BOOL ModifyValue(HWND hwnd, HKEY hKey, LPCTSTR valueName, BOOL EditBin)
                     warning(hwnd, IDS_MULTI_SZ_EMPTY_STRING);
                 }
 
-		lRet = RegSetValueEx(hKey, valueName, 0, type, (LPBYTE)lines, buflen);
+		lRet = RegSetValueEx(hKey, valueName, 0, type, (LPBYTE)lines, (DWORD) buflen);
 		HeapFree(GetProcessHeap(), 0, lines);
             }
             else
diff --git a/reactos/base/applications/regedit/find.c b/reactos/base/applications/regedit/find.c
index cba16609932..b5764447f34 100644
--- a/reactos/base/applications/regedit/find.c
+++ b/reactos/base/applications/regedit/find.c
@@ -76,6 +76,9 @@ static void SetFindFlags(DWORD dwFlags)
 
 static INT_PTR CALLBACK AbortFindDialogProc(HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
 {
+    UNREFERENCED_PARAMETER(lParam);
+    UNREFERENCED_PARAMETER(hDlg);
+
     switch(uMsg)
     {
         case WM_CLOSE:
@@ -102,6 +105,7 @@ static INT_PTR CALLBACK AbortFindDialogProc(HWND hDlg, UINT uMsg, WPARAM wParam,
 static BOOL RegSearchProc(LPVOID lpParam)
 {
     MSG msg;
+    UNREFERENCED_PARAMETER(lpParam);
 
     if (s_hwndAbortDialog && PeekMessage(&msg, s_hwndAbortDialog, 0, 0, PM_REMOVE))
     {
diff --git a/reactos/base/applications/regedit/framewnd.c b/reactos/base/applications/regedit/framewnd.c
index 381d304b7a1..83a5fec1c10 100644
--- a/reactos/base/applications/regedit/framewnd.c
+++ b/reactos/base/applications/regedit/framewnd.c
@@ -119,6 +119,7 @@ done:
 static void OnEnterMenuLoop(HWND hWnd)
 {
     int nParts;
+    UNREFERENCED_PARAMETER(hWnd);
 
     /* Update the status bar pane sizes */
     nParts = -1;
@@ -191,6 +192,7 @@ static void toggle_child(HWND hWnd, UINT cmd, HWND hchild)
 static BOOL CheckCommDlgError(HWND hWnd)
 {
     DWORD dwErrorCode = CommDlgExtendedError();
+    UNREFERENCED_PARAMETER(hWnd);
     switch (dwErrorCode) {
     case CDERR_DIALOGFAILURE:
         break;
@@ -347,6 +349,8 @@ static UINT_PTR CALLBACK ExportRegistryFile_OFNHookProc(HWND hdlg, UINT uiMsg, W
     LPTSTR pszSelectedKey;
     OFNOTIFY *pOfnNotify;
 
+    UNREFERENCED_PARAMETER(wParam);
+
 	switch(uiMsg) {
 	case WM_INITDIALOG:
         pOfn = (OPENFILENAME *) lParam;
@@ -453,6 +457,7 @@ BOOL PrintRegistryHive(HWND hWnd, LPTSTR path)
 {
 #if 1
     PRINTDLG pd;
+    UNREFERENCED_PARAMETER(path);
 
     ZeroMemory(&pd, sizeof(PRINTDLG));
     pd.lStructSize = sizeof(PRINTDLG);
@@ -714,7 +719,7 @@ InvokeRemoteRegistryPickerDialog(IN IDsObjectPicker *pDsObjectPicker,
         STGMEDIUM stm;
         FORMATETC fe;
 
-        fe.cfFormat = RegisterClipboardFormat(CFSTR_DSOP_DS_SELECTION_LIST);
+        fe.cfFormat = (CLIPFORMAT) RegisterClipboardFormat(CFSTR_DSOP_DS_SELECTION_LIST);
         fe.ptd = NULL;
         fe.dwAspect = DVASPECT_CONTENT;
         fe.lindex = -1;
@@ -787,6 +792,9 @@ static BOOL _CmdWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
     LONG lRet;
     int item;
 
+    UNREFERENCED_PARAMETER(lParam);
+    UNREFERENCED_PARAMETER(message);
+
     switch (LOWORD(wParam)) {
     case ID_REGISTRY_IMPORTREGISTRYFILE:
         ImportRegistryFile(hWnd);
diff --git a/reactos/base/applications/regedit/hexedit.c b/reactos/base/applications/regedit/hexedit.c
index 032db2892c5..122f8a69132 100644
--- a/reactos/base/applications/regedit/hexedit.c
+++ b/reactos/base/applications/regedit/hexedit.c
@@ -182,7 +182,7 @@ HEXEDIT_PaintLines(PHEXEDIT_DATA hed, HDC hDC, DWORD ScrollPos, DWORD First, DWO
   DWORD dx, dy, linestart;
   INT x;
   PBYTE buf, current, end, line;
-  UINT bufsize;
+  size_t bufsize;
   TCHAR hex[3], addr[17];
   RECT rct;
 
@@ -526,6 +526,7 @@ HEXEDIT_WM_NCDESTROY(PHEXEDIT_DATA hed)
 static LRESULT
 HEXEDIT_WM_CREATE(PHEXEDIT_DATA hed)
 {
+  UNREFERENCED_PARAMETER(hed);
   return 1;
 }
 
@@ -541,6 +542,7 @@ HEXEDIT_WM_SETFOCUS(PHEXEDIT_DATA hed)
 static LRESULT
 HEXEDIT_WM_KILLFOCUS(PHEXEDIT_DATA hed)
 {
+  UNREFERENCED_PARAMETER(hed);
   DestroyCaret();
   return 0;
 }
@@ -551,6 +553,8 @@ HEXEDIT_WM_VSCROLL(PHEXEDIT_DATA hed, WORD ThumbPosition, WORD SbCmd)
   int ScrollY;
   SCROLLINFO si;
 
+  UNREFERENCED_PARAMETER(ThumbPosition);
+
   ZeroMemory(&si, sizeof(SCROLLINFO));
   si.cbSize = sizeof(SCROLLINFO);
   si.fMask = SIF_ALL;
@@ -708,6 +712,9 @@ HEXEDIT_WM_MOUSEWHEEL(PHEXEDIT_DATA hed, int cyMoveLines, WORD ButtonsDown, LPPO
   SCROLLINFO si;
   int ScrollY;
 
+  UNREFERENCED_PARAMETER(ButtonsDown);
+  UNREFERENCED_PARAMETER(MousePos);
+
   SetFocus(hed->hWndSelf);
 
   si.cbSize = sizeof(SCROLLINFO);
@@ -733,6 +740,7 @@ HEXEDIT_WM_MOUSEWHEEL(PHEXEDIT_DATA hed, int cyMoveLines, WORD ButtonsDown, LPPO
 static LRESULT
 HEXEDIT_WM_GETDLGCODE(LPMSG Msg)
 {
+  UNREFERENCED_PARAMETER(Msg);
   return DLGC_WANTARROWS | DLGC_WANTCHARS;
 }
 
@@ -743,6 +751,7 @@ HEXEDIT_WM_LBUTTONDOWN(PHEXEDIT_DATA hed, INT Buttons, POINTS Pt)
   POINT EditPos;
   DWORD Hit = HEXEDIT_HitRegionTest(hed, Pt);
 
+  UNREFERENCED_PARAMETER(Buttons);
   SetFocus(hed->hWndSelf);
 
   hed->Position = HEXEDIT_PositionFromPoint(hed, Pt, Hit, &EditPos, &NewField);
@@ -849,6 +858,9 @@ HEXEDIT_WM_KEYDOWN(PHEXEDIT_DATA hed, INT VkCode)
 static LRESULT
 HEXEDIT_WM_SIZE(PHEXEDIT_DATA hed, DWORD sType, WORD NewWidth, WORD NewHeight)
 {
+  UNREFERENCED_PARAMETER(sType);
+  UNREFERENCED_PARAMETER(NewHeight);
+  UNREFERENCED_PARAMETER(NewWidth);
   HEXEDIT_Update(hed);
   return 0;
 }
diff --git a/reactos/base/applications/regedit/listview.c b/reactos/base/applications/regedit/listview.c
index fae63d4b7bb..911bfc362c5 100644
--- a/reactos/base/applications/regedit/listview.c
+++ b/reactos/base/applications/regedit/listview.c
@@ -128,7 +128,7 @@ static void AddEntryToList(HWND hwndLV, LPTSTR Name, DWORD dwValType, void* ValB
     item.state = 0;
     item.stateMask = 0;
     item.pszText = Name;
-    item.cchTextMax = _tcslen(item.pszText);
+    item.cchTextMax = (int) _tcslen(item.pszText);
     if (item.cchTextMax == 0)
         item.pszText = LPSTR_TEXTCALLBACK;
     item.iImage = 0;
@@ -356,6 +356,8 @@ static void OnGetDispInfo(NMLVDISPINFO* plvdi)
 static int CALLBACK CompareFunc(LPARAM lParam1, LPARAM lParam2, LPARAM lParamSort)
 {
     LINE_INFO*l, *r;
+    UNREFERENCED_PARAMETER(lParamSort);
+
     l = (LINE_INFO*)lParam1;
     r = (LINE_INFO*)lParam2;
 
@@ -373,6 +375,7 @@ static int CALLBACK CompareFunc(LPARAM lParam1, LPARAM lParam2, LPARAM lParamSor
 BOOL ListWndNotifyProc(HWND hWnd, WPARAM wParam, LPARAM lParam, BOOL *Result)
 {
     NMLVDISPINFO* Info;
+    UNREFERENCED_PARAMETER(wParam);
     *Result = TRUE;
     switch (((LPNMHDR)lParam)->code) {
         case LVN_GETDISPINFO:
diff --git a/reactos/base/applications/regedit/main.c b/reactos/base/applications/regedit/main.c
index 7d124555b8c..d3f248229d3 100644
--- a/reactos/base/applications/regedit/main.c
+++ b/reactos/base/applications/regedit/main.c
@@ -62,41 +62,38 @@ BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
     HMENU hEditMenu;
     TCHAR szBuffer[256];
 
-    WNDCLASSEX wcFrame = {
-                             sizeof(WNDCLASSEX),
-                             CS_HREDRAW | CS_VREDRAW/*style*/,
-                             FrameWndProc,
-                             0/*cbClsExtra*/,
-                             0/*cbWndExtra*/,
-                             hInstance,
-                             LoadIcon(hInstance, MAKEINTRESOURCE(IDI_REGEDIT)),
-                             LoadCursor(0, IDC_ARROW),
-                             0/*hbrBackground*/,
-                             0/*lpszMenuName*/,
-                             szFrameClass,
-                             (HICON)LoadImage(hInstance, MAKEINTRESOURCE(IDI_REGEDIT), IMAGE_ICON,
-                                              GetSystemMetrics(SM_CXSMICON), GetSystemMetrics(SM_CYSMICON), LR_SHARED)
-                         };
-    ATOM hFrameWndClass = RegisterClassEx(&wcFrame); /* register frame window class */
+    WNDCLASSEX wcFrame;
+    WNDCLASSEX wcChild;
+    ATOM hFrameWndClass;
+    ATOM hChildWndClass;
 
-    WNDCLASSEX wcChild = {
-                             sizeof(WNDCLASSEX),
-                             CS_HREDRAW | CS_VREDRAW/*style*/,
-                             ChildWndProc,
-                             0/*cbClsExtra*/,
-                             sizeof(HANDLE)/*cbWndExtra*/,
-                             hInstance,
-                             LoadIcon(hInstance, MAKEINTRESOURCE(IDI_REGEDIT)),
-                             LoadCursor(0, IDC_ARROW),
-                             0/*hbrBackground*/,
-                             0/*lpszMenuName*/,
-                             szChildClass,
-                             (HICON)LoadImage(hInstance, MAKEINTRESOURCE(IDI_REGEDIT), IMAGE_ICON,
-                                              GetSystemMetrics(SM_CXSMICON), GetSystemMetrics(SM_CYSMICON), LR_SHARED)
+    ZeroMemory(&wcFrame, sizeof(WNDCLASSEX));
+    wcFrame.cbSize = sizeof(WNDCLASSEX);
+    wcFrame.style = CS_HREDRAW | CS_VREDRAW;
+    wcFrame.lpfnWndProc = FrameWndProc;
+    wcFrame.hInstance = hInstance;
+    wcFrame.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_REGEDIT));
+    wcFrame.hIconSm = (HICON)LoadImage(hInstance, MAKEINTRESOURCE(IDI_REGEDIT),
+                                       IMAGE_ICON, GetSystemMetrics(SM_CXSMICON),
+                                       GetSystemMetrics(SM_CYSMICON), LR_SHARED);
+    wcFrame.hCursor = LoadCursor(0, IDC_ARROW); 
+    wcFrame.lpszClassName = szFrameClass;
 
-                         };
-    ATOM hChildWndClass = RegisterClassEx(&wcChild); /* register child windows class */
-    hChildWndClass = hChildWndClass; /* warning eater */
+    hFrameWndClass = RegisterClassEx(&wcFrame); /* register frame window class */
+
+    ZeroMemory(&wcChild, sizeof(WNDCLASSEX));
+    wcChild.cbSize = sizeof(WNDCLASSEX);
+    wcChild.style = CS_HREDRAW | CS_VREDRAW;
+    wcChild.lpfnWndProc = ChildWndProc;
+    wcChild.cbWndExtra = sizeof(HANDLE);
+    wcChild.hInstance = hInstance;
+    wcChild.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_REGEDIT));
+    wcChild.hCursor = LoadCursor(0, IDC_ARROW),
+    wcChild.lpszClassName =  szChildClass,
+    wcChild.hIconSm = (HICON)LoadImage(hInstance, MAKEINTRESOURCE(IDI_REGEDIT), IMAGE_ICON,
+                                              GetSystemMetrics(SM_CXSMICON), GetSystemMetrics(SM_CYSMICON), LR_SHARED);
+
+    hChildWndClass = RegisterClassEx(&wcChild); /* register child windows class */
 
     RegisterHexEditorClass(hInstance);
 
@@ -195,6 +192,8 @@ int APIENTRY WinMain(HINSTANCE hInstance,
     MSG msg;
     HACCEL hAccel;
 
+    UNREFERENCED_PARAMETER(hPrevInstance);
+
     /*
         int hCrt;
         FILE *hf;
@@ -238,5 +237,5 @@ int APIENTRY WinMain(HINSTANCE hInstance,
     }
     
     ExitInstance(hInstance);
-    return msg.wParam;
+    return (int) msg.wParam;
 }
diff --git a/reactos/base/applications/regedit/regproc.c b/reactos/base/applications/regedit/regproc.c
index 56a9486caaf..e2ffa3cd8db 100644
--- a/reactos/base/applications/regedit/regproc.c
+++ b/reactos/base/applications/regedit/regproc.c
@@ -227,8 +227,8 @@ DWORD convertHexCSVToHex(char *str, BYTE *buf, ULONG bufLen)
     char *s = str;  /* Pointer to current */
     char *b = (char*) buf;  /* Pointer to result  */
 
-    ULONG strLen    = strlen(str);
-    ULONG strPos    = 0;
+    size_t strLen    = strlen(str);
+    size_t strPos    = 0;
     DWORD byteCount = 0;
 
     memset(buf, 0, bufLen);
@@ -645,6 +645,7 @@ void doQueryValue(LPSTR stdInput)
  */
 void doDeleteValue(LPSTR line)
 {
+    UNREFERENCED_PARAMETER(line);
     fprintf(stderr,"%s: deleteValue not yet implemented\n", getAppName());
 }
 
@@ -655,6 +656,7 @@ void doDeleteValue(LPSTR line)
  */
 void doDeleteKey(LPSTR line)
 {
+    UNREFERENCED_PARAMETER(line);
     fprintf(stderr,"%s: deleteKey not yet implemented\n", getAppName());
 }
 
@@ -665,6 +667,7 @@ void doDeleteKey(LPSTR line)
  */
 void doCreateKey(LPSTR line)
 {
+    UNREFERENCED_PARAMETER(line);
     fprintf(stderr,"%s: createKey not yet implemented\n", getAppName());
 }
 
@@ -735,6 +738,7 @@ void processSetValue(LPSTR line)
  */
 void processQueryValue(LPSTR cmdline)
 {
+    UNREFERENCED_PARAMETER(cmdline);
     fprintf(stderr,"ERROR!!! - temporary disabled");
     exit(1);
 #if 0
@@ -1791,6 +1795,8 @@ LONG RegSearch(HKEY hKey, LPTSTR lpSubKey, size_t iSubKeyLength,
     LONG lResult;
     LPCTSTR s;
 
+    UNREFERENCED_PARAMETER(dwValueIndex);
+
     if (dwSearchFlags & (RSF_LOOKATVALUES | RSF_LOOKATDATA))
         return ERROR_CALL_NOT_IMPLEMENTED;    /* NYI */
 
diff --git a/reactos/base/applications/regedit/security.c b/reactos/base/applications/regedit/security.c
index a56f7bae570..440a017a95f 100644
--- a/reactos/base/applications/regedit/security.c
+++ b/reactos/base/applications/regedit/security.c
@@ -28,6 +28,8 @@ DEFINE_GUID(IID_IRegKeySecurity, 0x965fc360, 0x16ff, 0x11d0, 0x0091, 0xcb,0x00,0
 #if REGEDIT_IMPLEMENT_ISECURITYINFORMATION2
 DEFINE_GUID(IID_IRegKeySecurity2, 0xc3ccfdb4, 0x6f88, 0x11d2, 0x00a3, 0xce,0x00,0xc0,0x4f,0xb1,0x78,0x2a);
 #endif
+
+/* FIXME: already defined in aclui.h - causing problems when compiling with MSVC/PSDK*/
 DEFINE_GUID(IID_IEffectivePermission, 0x3853dc76, 0x9f35, 0x407c, 0x0088, 0xa1,0xd1,0x93,0x44,0x36,0x5f,0xbc);
 DEFINE_GUID(IID_ISecurityObjectTypeInfo, 0xfc3066eb, 0x79ef, 0x444b, 0x0091, 0x11,0xd1,0x8a,0x75,0xeb,0xf2,0xfa);
 
@@ -839,7 +841,7 @@ RegKeyEditPermissions(HWND hWndOwner,
     LPTSTR lpKeyPath = NULL;
     PCRegKeySecurity RegKeySecurity;
     SI_OBJECT_INFO ObjectInfo;
-    int lnMachine = 0, lnKeyName = 0;
+    size_t lnMachine = 0, lnKeyName = 0;
 
     if (pfnEditSecurity == NULL)
     {