When I switch between different maximized MDIChildWnd using Ctrl+Tab key, the screen is black! sometimes moving mouse or LBUTTON click mouse it will disappear, but often it won't!
You can easily reproduce this bug in any MFC samples provided with OCC 4.0.
Due to each switch between different maximized MDIChildWnd using Ctrl+Tab key, my debug code show the corresponding V3d_View::Redraw ( in CView::OnDraw ) is calling, I think this is a OCC bug.
I often find other bug about redraw of OCC under Windows platform. especially some portion of client area is black.
I hope someone can tell me how to avoid this problem. Any workaround is highly appreciated.