🚀 go-pugleaf

    I have a couple of questions on Windows developement using C/C++ 7.0.
    Any insights on the subjects will be greatly appreciated.


        1. How does one extend MFC to support custom controls
           and other window classes?  Specifically I would like
           to derive a class from CWnd for the custom controls
           I had developed.  Many of my controls use extra bytes
           per window instance (cbWndExtra!=0 in WNDCLASS data
           structure).  The current AfxRegisterWndClass always
           sets cbWndExtra=cbClsExtra=0.  Is there a simple way
           to do this without modifying MFC source?


        2. In processing WM_PAINT, BeginPaint() API is called
           and an invalidated region of the window is returned.
           What about WM_NCPAINT?  Is there a way to detect only
           the invalidated area in the non-client area for
           painting?  Or do I have to paint the entire non-client
           area everytime?

    Thanks in advance.