diff --git a/dll/win32/mspatcha/mspatcha.spec b/dll/win32/mspatcha/mspatcha.spec
index cc8ca94fbde..08231e0d6f4 100644
--- a/dll/win32/mspatcha/mspatcha.spec
+++ b/dll/win32/mspatcha/mspatcha.spec
@@ -1,12 +1,12 @@
 1 stdcall ApplyPatchToFileA(str str str long)
-2 stub ApplyPatchToFileByHandles
+2 stdcall -stub ApplyPatchToFileByHandles(ptr ptr ptr long)
 3 stub ApplyPatchToFileByHandlesEx
 4 stub ApplyPatchToFileExA
 5 stub ApplyPatchToFileExW
 6 stdcall ApplyPatchToFileW(wstr wstr wstr long)
 7 stdcall GetFilePatchSignatureA(str long ptr long ptr long ptr long ptr)
-8 stub GetFilePatchSignatureByHandle
+8 stdcall -stub GetFilePatchSignatureByHandle(ptr long ptr long ptr long ptr long ptr)
 9 stdcall GetFilePatchSignatureW(wstr long ptr long ptr long ptr long ptr)
-10 stub TestApplyPatchToFileA
-11 stub TestApplyPatchToFileByHandles
-12 stub TestApplyPatchToFileW
+10 stdcall -stub TestApplyPatchToFileA(str str long)
+11 stdcall -stub TestApplyPatchToFileByHandles(ptr ptr long)
+12 stdcall -stub TestApplyPatchToFileW(wstr wstr long)
diff --git a/dll/win32/mspatcha/mspatcha_main.c b/dll/win32/mspatcha/mspatcha_main.c
index f78b8ab352d..8dc4403d13d 100644
--- a/dll/win32/mspatcha/mspatcha_main.c
+++ b/dll/win32/mspatcha/mspatcha_main.c
@@ -105,7 +105,7 @@ BOOL WINAPI ApplyPatchToFileW(LPCWSTR patch_file, LPCWSTR old_file, LPCWSTR new_
  */
 BOOL WINAPI GetFilePatchSignatureA(LPCSTR filename, ULONG flags, PVOID data, ULONG ignore_range_count,
                                    PPATCH_IGNORE_RANGE ignore_range, ULONG retain_range_count,
-                                   PPATCH_RETAIN_RANGE retain_range, ULONG bufsize, LPSTR buffer)
+                                   PPATCH_RETAIN_RANGE retain_range, ULONG bufsize, PVOID buffer)
 {
     FIXME("stub - %s, %x, %p, %u, %p, %u, %p, %u, %p\n", debugstr_a(filename), flags, data,
           ignore_range_count, ignore_range, retain_range_count, retain_range, bufsize, buffer);
@@ -118,7 +118,7 @@ BOOL WINAPI GetFilePatchSignatureA(LPCSTR filename, ULONG flags, PVOID data, ULO
  */
 BOOL WINAPI GetFilePatchSignatureW(LPCWSTR filename, ULONG flags, PVOID data, ULONG ignore_range_count,
                                    PPATCH_IGNORE_RANGE ignore_range, ULONG retain_range_count,
-                                   PPATCH_RETAIN_RANGE retain_range, ULONG bufsize, LPWSTR buffer)
+                                   PPATCH_RETAIN_RANGE retain_range, ULONG bufsize, PVOID buffer)
 {
     FIXME("stub - %s, %x, %p, %u, %p, %u, %p, %u, %p\n", debugstr_w(filename), flags, data,
           ignore_range_count, ignore_range, retain_range_count, retain_range, bufsize, buffer);
diff --git a/sdk/include/psdk/patchapi.h b/sdk/include/psdk/patchapi.h
index 9a62a0ff64e..03853283ac0 100644
--- a/sdk/include/psdk/patchapi.h
+++ b/sdk/include/psdk/patchapi.h
@@ -28,6 +28,13 @@ extern "C" {
 #define APPLY_OPTION_TEST_ONLY      0x00000004
 #define APPLY_OPTION_VALID_FLAGS    0x00000007
 
+
+//
+// apply error codes
+//
+#define ERROR_PATCH_CORRUPT         0xC00E4102
+#define ERROR_PATCH_WRONG_FILE      0xC00E4104
+
 typedef struct _PATCH_IGNORE_RANGE
 {
     ULONG OffsetInOldFile;
@@ -41,9 +48,36 @@ typedef struct _PATCH_RETAIN_RANGE
     ULONG OffsetInNewFile;
 } PATCH_RETAIN_RANGE, *PPATCH_RETAIN_RANGE;
 
-BOOL WINAPI ApplyPatchToFileA(LPCSTR,LPCSTR,LPCSTR,ULONG);
-BOOL WINAPI ApplyPatchToFileW(LPCWSTR,LPCWSTR,LPCWSTR,ULONG);
+
+typedef WINBOOL (CALLBACK PATCH_PROGRESS_CALLBACK)(PVOID CallbackContext, ULONG CurrentPosition, ULONG MaximumPosition);
+typedef PATCH_PROGRESS_CALLBACK *PPATCH_PROGRESS_CALLBACK;
+
+
+BOOL WINAPI TestApplyPatchToFileA(LPCSTR PatchFileName, LPCSTR OldFileName, ULONG ApplyOptionFlags);
+BOOL WINAPI TestApplyPatchToFileW(LPCWSTR PatchFileName, LPCWSTR OldFileName, ULONG ApplyOptionFlags);
+#define     TestApplyPatchToFile WINELIB_NAME_AW(TestApplyPatchToFile)
+BOOL WINAPI TestApplyPatchToFileByHandles(HANDLE PatchFileHandle, HANDLE OldFileHandle, ULONG ApplyOptionFlags);
+
+
+BOOL WINAPI ApplyPatchToFileA(LPCSTR PatchFileName, LPCSTR OldFileName, LPCSTR NewFileName, ULONG ApplyOptionFlags);
+BOOL WINAPI ApplyPatchToFileW(LPCWSTR PatchFileName, LPCWSTR OldFileName, LPCWSTR NewFileName, ULONG ApplyOptionFlags);
 #define     ApplyPatchToFile WINELIB_NAME_AW(ApplyPatchToFile)
+BOOL WINAPI ApplyPatchToFileByHandles(HANDLE PatchFileHandle, HANDLE OldFileHandle, HANDLE NewFileHandle, ULONG ApplyOptionFlags);
+
+
+BOOL WINAPI GetFilePatchSignatureA(LPCSTR FileName, ULONG OptionFlags, PVOID OptionData, ULONG IgnoreRangeCount,
+                                   PPATCH_IGNORE_RANGE IgnoreRangeArray, ULONG RetainRangeCount,
+                                   PPATCH_RETAIN_RANGE RetainRangeArray, ULONG SignatureBufferSize,
+                                   PVOID SignatureBuffer);
+BOOL WINAPI GetFilePatchSignatureW(LPCWSTR FileName, ULONG OptionFlags, PVOID OptionData, ULONG IgnoreRangeCount,
+                                   PPATCH_IGNORE_RANGE IgnoreRangeArray, ULONG RetainRangeCount,
+                                   PPATCH_RETAIN_RANGE RetainRangeArray, ULONG SignatureBufferSize,
+                                   PVOID SignatureBuffer);
+#define     GetFilePatchSignature WINELIB_NAME_AW(GetFilePatchSignature)
+BOOL WINAPI GetFilePatchSignatureByHandle(HANDLE FileHandle, ULONG OptionFlags, PVOID OptionData, ULONG IgnoreRangeCount,
+                                          PPATCH_IGNORE_RANGE IgnoreRangeArray, ULONG RetainRangeCount,
+                                          PPATCH_RETAIN_RANGE RetainRangeArray, ULONG SignatureBufferSize,
+                                          PVOID SignatureBuffer);
 
 #ifdef __cplusplus
 }