https://bugs.winehq.org/show_bug.cgi?id=5048
--- Comment #28 from Erich E. Hoover erich.e.hoover@wine-staging.com --- Second set committed now:
[1/2] ws2_32: Implement a basic synchronous TransmitFile: https://source.winehq.org/git/wine.git/commitdiff/4d081f36efefd3ccf702cacea4...
[2/2] ws2_32: Add support for TransmitFile headers and footers: https://source.winehq.org/git/wine.git/commitdiff/f1ebc93603058ee07b5b496d63...
This is enough for non-overlapped (APC) applications to use TransmitFile.