https://bugs.winehq.org/show_bug.cgi?id=22039
--- Comment #19 from Henri Verbeet hverbeet@gmail.com --- (In reply to Aaryaman Vasishta from comment #17)
IIRC MSDN doesn't contain documentation from DX <=8. According to the old DX 7 docs, GetAppDate does return a DWORD.
And that matches the actual header in the SDK.