How to avoid flicker while handling WM_ERASEBKGND in Windows dialog

Question

I have a dialog that resizes. It also has a custom background which I paint in response to a WM_ERASEBKGND call (currently a simple call to FillSolidRect).

When t

Answer 1

Assuming that "FillSolidRect" is the erase of your background then return TRUE from the WM_ERASEBKGND.

To do the double buffering that you are almost doing in your code fragment, you will need to use CreateCompatibleBitmap and select that into your memDC.