This problem might be very obvious but I can't solve it. In my program I have three windows, the main parent window, a child with scroll in the parent window and a child without scroll window in the child with scroll. So I've registered three window classes and I have a separate winproc for each window. I create both child windows in wm_create of the parent winproc. When I run the program the three windows are all in the correct position but when I resize the parent the child with scroll is still visible but the child without scroll has gone, I'm unable to get it visible again. I tried various things and reading more petzold, but still can't work it out.
Thank you for any replies.
I'm using C .