Do you happen to have links to any good documentation/articles on this topic? I'm working on what amounts to a dark theme for Win32 controls and largely making it up as I go along, relying on tidbits and off-hand mentions from defunct blogs.
Also I know far far too much about the internals of classic win32 rendering if you have questions
[0] https://github.com/derceg/explorerplusplus/blob/4bad3ab95d87...
Some controls like buttons, list boxes, list views are reasonably well behaved, especially when theming is turned off. Combo boxes and toolbars are more temperamental. Check boxes, scroll bars, menus, and message boxes require a lot of custom painting work.