[Bug 15232] New: Button in simple OpenGL application gets overdrawn

http://bugs.winehq.org/show_bug.cgi?id=15232

Summary: Button in simple OpenGL application gets overdrawn
           Product: Wine
           Version: 1.1.4
          Platform: Other
               URL: http://bugs.winehq.org/attachment.cgi?id=5777
        OS/Version: other
            Status: UNCONFIRMED
          Severity: trivial
          Priority: P2
         Component: -unknown
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

The button of
http://bugs.winehq.org/attachment.cgi?id=5777
gets overdrawn. A year ago Chris Robinson explained why this Application does
not work with wine and how to change the application and the wine configuration
to get it working:
quote from http://www.winehq.org/pipermail/wine-devel/2007-October/059550.html:
----
First, since the GL window is the 
top-level window, it draws to it directly so it doesn't get clipped. Second, 
CreateWindow for the GL window is missing the WS_CLIPCHILDREN flag. If I 
force offscreen rendering and add the flag, the demo works.
----

I am not sure how to force offscreen rendering. I tried to set
"Software/Wine/Direct3D/OffscreenRenderingMode" to "fbo" and added the flag to
the window but it did not work.