http://bugs.winehq.org/show_bug.cgi?id=1374
------- Additional Comments From lionel.ulmer@free.fr 2004-06-05 16:23 ------- Well, from my last analysis of the Wine code, using the CLIPSIBLINGS flag should fix the issue as in this case, the WGL code will receive the window it needs to draw into and not its parent.
Anyway, you can always ask, but this is still something that needs to be fixed in Wine's OpenGL code one of these days...