I'm using DwmExtendFrameIntoClientArea() to have a nice look of my windows, but there is a 'glitch' while resizing window - when things are scaling, for small amount of time there is visible background, which's treated as black when I have property Background="Transparent" set.
How to get rid of this problem? Of course I could extend margins to cover much more than strictly needed amount of a window, but I feel it'd be too CPU-consuming.
FWIK now - there is no such solution - after size change borders have to be extended and Aero cares about it, leaving no way to change it.