3 ms·Maybe for some reason they clear the screen first before redrawing? That would certainly cause a flicker.by FreeFull 10y agoMaybe for some reason they clear the screen first before redrawing? That would certainly cause a flicker.deleted 10y ago[deleted]__s 10y agoNot if they double bufferpacaro 10y agoIn old school windows development, the mistake was normally to draw directly to the window's DC.