windows problem

I'm doing double buffering with Windows. And everything works fine, i copy one DC to another. Everything is rendered except child windows.
I declare the Child Window before the main loop wirh CreateWindowEx(); But when i run & compile my child window flickers and dissapears. I think it's cause of the double buffering. I don't know what to do.
I gues i need to do something with WM_PAINT in Callback, But what and how.
I need to make that child window constantly visible!

Hmm. Try adding the WS_CLIPCHILDREN style to your parent window?

tryed, doesn't work...

no, it works!!!!
Thanks a Lot!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!