This software may be able to convert an app for Vista/7/10 to an XP app. I'm sorry if unable to do it.

Platforms: Windows XP/Vista/7/10

Download: https://katahiromz.web.fc2.com/vista2xp/en

It modifies the IAT (Import Address Table) of EXE/DLL files.

• If any Vista+ kernel32 functions, importing of kernel32.dll will be altered to v2xker32.dll.
• If any Vista+ comctl32 functions, importing of comctl32.dll will be altered to v2xctl32.dll.
• If any Vista+ user32 functions, importing of user32.dll will be altered to v2xu32.dll.
• If any Vista+ ole32 functions, importing of ole32.dll will be altered to v2xol.dll.
• If any Vista+ shell32 functions, importing of shell32.dll will be altered to v2xsh32.dll.
• If any Vista+ msvcrt functions, importing of msvcrt.dll will be altered to v2xcrt.dll.
• If any Vista+ advapi32 functions, importing of advapi32.dll will be altered to v2xadv32.dll.

You can check the IAT by dumpbin /imports of Visual Studio Command Prompt.

1. Open vista2xp.exe program file. A dialog box will be open.
2. Drop the EXE/DLL files to the dialog to be converted.
3. Click the [Convert] button.
4. Files will be converted. Some DLL files will be automatically added if necessary.
5. If you want to revert, please use the files inside the Vista2XP-Backup folder that was created.

• 2019-05-05 ver.0.2
  • First release.
• 2019-05-06 ver.0.3
  • Add v2xctl32 and v2xu32.
• 2019-05-09 ver.0.4
  • Support K32* functions.
  • Improve TaskDialog.
  • Add v2xol (ole32).
  • Add v2xsh32 (shell32).
• 2019-05-22 ver.0.5
  • Make [Cancel] button [Exit].
  • Supported SHGetLocalizedName, SHSetFolderPathA and SHSetFolderPathW.
  • Supported TaskDialogIndirect.
• 2019-08-16 ver.0.6
  • Fixed broken v2xu32.dll.
  • Supported SHCreateItemFromParsingName.
  • Supported GetDpiForWindow.
  • Supported SetThreadDpiAwarenessContext.
  • Add v2xcrt (msvcrt).
  • Supported wcsnlen, memmove_s and memcpy_s.
  • Supported __CxxFrameHandler3 and _except_handler4_common.
• 2019-09-15 ver.0.7
  • Modify optional header's version info.
  • Supported GetVersion, GetVersionExA and GetVersionExW.
• 2021-05-11 ver.0.8
  • SRW lock functions are partially supported.
  • Initialize-once functions are partially supported.
  • Condition variables functions are partially supported.
• 2022-01-23 ver.0.8.1
  • Supported GetThreadUILanguage/SetThreadUILanguage.
  • Improved v2xctl32 ordinal exports.
• 2024-06-02 ver.0.8.2
  • Added v2xadv32 (advapi32).
• 2024-06-03 ver.0.8.3
  • Supported CompareStringEx.
• 2024-06-03 ver.0.8.4
  • Fixed fallbacking of v2xadv32.
  • Fixed loading DLLs.
• 2024-06-06 ver.0.8.5
  • Supported RegDeleteKeyExA/W.
  • Supported CreateEventExA/W.
• 2024-06-07 ver.0.8.6
  • Fixed v2xadv32 hooking.
  • Supported SetFileInformationByHandle, GetFileInformationByHandleEx, and OpenFileById.
  • Supported GetFinalPathNameByHandleA/W.
• 2024-06-08 ver.0.8.7
  • Supported InitializeCriticalSectionEx.
• 2024-06-14 ver.0.8.8
  • Supported filesystem redirection functions.
  • Introduced version control setting.

Use ReactOS Build Environment, and use cmake. Visual Studio can't build.

• Please don't convert the system files.
• It doesn't make sense to use on the compressed files. Please use on the installed/expanded files.
• DOTNET, DirectX 10 and x64 are not supported yet.

If you are lacking DirectX 10 support, take a look of this: https://km-software-directx-10.apponic.com/.

Katayama Hirofumi MZ [email protected]