how to invalidate parent window without sending wm_paint to child window?

Question

the parent and the child window is in the same size. and the the parent listens to the child's repainting when child repainting, the parent repainting. so I cannot use invalidate to clean the parent window, cos this will send wm_paint to child window, then a endless cycle.

how can i clean up parent widnow without use invalidateRect,invalidateRgn and so on. or, how can i invalidate parent without send wm_paint to child window?

thx!

Answer 1

You could set the WS_CLIPCHILDREN style on your window, or try calling the RedrawWindow function specifying RDW_NOCHILDREN as the final parameter. This may do what you want, although it's somewhat difficult to tell.