OK, here we go : I know how to display OpenGL stuff in an MFC frame, or in a portion of an MFC dialog box (using a CStatic control). BUT I noticed this technique wouldn''t work anymore for child dialog boxes on some OS ??? Actually, it looks like it''s working on 98 and ME, but not on NT, 2000 or XP. If s.o. experienced the same problem and possibly found a solution to this, please tell me about it. Thanx