XP and Vista Caption bar problem with SetWindowRgn

[Nathan Going]

Im having a problem when I SetWindowRgn I lose the visual appearance of XP and Vista, as seen in Figure 1[^]. Any ideas of what I'm doing wrong? Here is the code i'm using DialogTest.rar Thanks

[Mike Dimmick]

Yes, that's what SetWindowRgn does. How can Windows know how to attach a title bar to your region? Applications that do this draw their own title bar and respond to WM_NCHITTEST to tell Windows which part of the UI has been hit. You can draw standard Windows controls with DrawThemeBackground/DrawThemeIcon/DrawThemeText etc, if theming is enabled, or DrawCaption/DrawFrameControl if not.

DoEvents: Generating unexpected recursion since 1991

[Nathan Going]

No, I understand that. I’m setting the region when the user presses the button, then unsetting the region when it's pressed again. The problem is that when I put back WS_CAPTION the window was being redrawn without visual styles. I just figured out that I was clearing the region after setting WS_CAPTION back to my window. I switched the order and every thing worked perfectly.... Thanks for your response.