My level editor calls InvalidateRect whenever you scroll or load a new map etc. However if you drag the toolbar across, it keeps trying to repaint very quickly. However it calls my render() method each time which is too slow to keep up so you get a trailing white rectangle following. Can I somehow just find the latest occurance of a certain message in the queue and act on that, throwing away the others? ps do you know why I ca''nt just re-Present the scene? It doesn''t remember it if I render, then call Present an extra time. Read about my game, project #1 NEW (13th August): A new screenshot is up, plus diaries for week #3 John 3:16