This DLL makes the launcher overlay work under Wine. The launcher shares overlay frames with the game. When omp-client.dll calls USER32!PrintWindow, the DLL copies a frame into the game's bitmap. If no frame is available, it calls the original function.

Run the Build Wine overlay DLL workflow from the Actions tab to build a 32-bit Windows DLL with MSVC. Download omp-wine.dll from that run's Artifacts section. Check Publish this build as a GitHub Release if you want to keep it as a release asset.

To build it locally, use an x86 Native Tools Command Prompt for Visual Studio:

cl /nologo /LD /MT /O2 /W3 /TC ompwine.c /link /OUT:omp-wine.dll gdi32.lib