https://bugs.winehq.org/show_bug.cgi?id=57259
--- Comment #4 from Zhiyi Zhang zzhang@codeweavers.com --- (In reply to Fabian Maurer from comment #3)
I'm pretty sure, the underlying issue is that it uses the user32 button class instead of the comctl32 button class. Don't know why that would be the case though...
Probably because the application doesn't call InitCommonControls() so comctl32.dll is never loaded and the lack of a manifest to enable comctl32.