Does the desktop window still exist when an app is running fullscreen?
Didn't think it did as you can see it redrawing after closing a fullscreen app on cruddy old systems.
I think you need to provide more information: Operating system, type of graphics hardware, vRam, DirectX version, and the like. Ultimately its probably nothing to do with Blitzmax, specifically.
One more thing; Try using CreateGraphics() instead of just Graphics().
Didn't think it did as you can see it redrawing after closing a fullscreen app on cruddy old systems.
I think you need to provide more information: Operating system, type of graphics hardware, vRam, DirectX version, and the like. Ultimately its probably nothing to do with Blitzmax, specifically.
One more thing; Try using CreateGraphics() instead of just Graphics().