https://bugs.winehq.org/show_bug.cgi?id=51589
Zhiyi Zhang zzhang@codeweavers.com changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |zzhang@codeweavers.com Ever confirmed|0 |1 Status|UNCONFIRMED |NEW
--- Comment #3 from Zhiyi Zhang zzhang@codeweavers.com --- Confirmed with wine-staging git bdb9f49. The related patch is comctl32-version_6. When the application detects that the comctl32 version is 6, it uses theming drawing, which eventually calls an unimplemented function DrawThemeIcon(). With wine having version 5 in comctl32, the application disables theming for its buttons.
I will look into implementing DrawThemeIcon() later if no one else takes this.