I built a scene (under Win32). Then I begin to resize window. When windows reached some size two black bands appeared at the left and bottom side of the window. If I turn off double buffering (flag PFD_DOUBLEBUFFER) or use PFD_DRAW_TO_BITMAP - no bug.
What’s the matter?
A search on the forum archive should give you the answer… anyway, this is a bug in opengl32.dll (the software rendering library), not much you can do about it, unless you are using HW acceleration, in that case it might be something else…