I got an Nvidia 8800 card + latest 64bit drivers for Vista and they don't have the problem. It's a good question what's the correct behaviour. Normally you shouldn't see the artefacts.
It's definetly caused by the bRepaint parameter of MoveWindow( );.
On my system it's fine, on yours not...anyway....I changed it and it seems to work fine now 8)


Roman Scherzer