Modern Windows API Shim (MWAS)

This is the repository for Discord Messenger's modern Windows API shim. Its aim is to implement a shim for certain APIs that were implemented in versions earlier than Discord Messenger targets.

It performs its duty by:

• Using the actual procedures, when available, or

• Providing an (admittedly maybe crappy, but passable) implementation of the function, if Windows did not provide us with its own version.

Usage

To use, simply embed the reimpl.cpp and ri/reimpl.hpp files in your project. Then you will simply add ri:: to all uses of modern Windows APIs that are implemented by this project and call ri::InitReimplementation() before any of the code that uses it.

Functions shimmed by this compatibility layer

This is a list of functions shimmed, along with their implementation if Windows doesn't provide one.

• GetFileSizeEx - Implemented using GetFileSize.

• SetFilePointerEx - Copied from https://github.com/enlyze/EnlyzeWinCompatLib/blob/master/src/winnt_40.cpp#L43

• VerSetConditionMask - Copied from ReactOS' implementation

• VerifyVersionInfo - Implemented using GetVersionEx.

• RegisterWaitForSingleObject - Returns INVALID_HANDLE_VALUE through phNewWaitObject and FALSE to the caller. Not implemented.

• UnregisterWaitEx - Not implemented, returns FALSE.

• GradientFill - Not implemented, returns FALSE.

• AlphaBlend - Not implemented, simply calls StretchBlt.

• TransparentBlt - Not implemented, simply calls StretchBlt.

• SHGetFolderPath - Not implemented, just returns ".".

• PathFileExists - Implemented using GetFileAttributes.

• GetMenuInfo - Not implemented, returns FALSE.

• SetMenuInfo - Not implemented, returns FALSE.

• GetGestureInfo - Not implemented, returns FALSE.

• SetDCBrushColor - Not implemented, returns 0.

• SetDCPenColor - Not implemented, returns 0.

• MonitorFromPoint - Returns a fake magic value to be passed into GetMonitorInfo.

• GetMonitorInfo - Simulates fetching information about the primary monitor using GetSystemMetrics.

• AnimateWindow - Hides or shows the window based on the flags parameter. Animation related flags are ignored.

License

This project is licensed under the MIT license. See the license file for details.