[Bug 2398] OpenGL is only used on top level windows so child windows get overdrawn

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=2398

------- Additional Comments From [e-mail]  2007-12-04 12:15 -------
First of all are you sure that the Warcraft editor is using OpenGL for graphics
and not Direct3D? I ask this because this patch only helps in case of OpenGL.

The plan is to move Direct3D over to the win32 opengl code when opengl32 is
stable. When that's the case it can help Direct3D too but not right now.