I have some trouble witht the Pixelformat. It seems that the Pixelformat depends on the used Videocard/driver or something else Hardwarespecific. Does anyone knows the exact dependency of a Pixelformat?? The trouble i have is that on some videocards a Pixelformat would be choosen that provide a black corner if the Viewport reaches a specific size. On an other system with an other videocard this does not happenend. I don''t know exactly the reason for this but I think it depends on the Pixelformat. Perhaps anyone has more experience with this topic and can explain me what the reason could be. Thanks in advance P. Gmeiner Peter Gmeiner