Quote Originally Posted by fabel358 View Post
I haven't received a response. Am I the only one experiencing mouse wheel scrolling issues on Windows 7, 8, or 8.1? Or is everyone else on vacation?
I can only test on xp and win 11. So I am dependent on others.

Maybe you can find the problem yourself? Load the demo project with full source code and check what is going wrong on WM_MOUSEWHEEL.