Change dynamically a RUNTIME_CLASSE in a SDI MFC based project

[LnOrS]

I've an MFC based project in which there are frame windows (I used a splitter). Each frame is managed by a "RUNTIME_CLASS", but I'd like to change the classes in running time, depending on the choices made.
I'm using an SDI and one of the classes for graphic display is based on OpenGL.

 

[LnOrS]

Well I solved my own problem!
If you seek the same thing... try

http://msdn.microsoft.com/library/periodic/period98/1298_C_LAYOUT_C.htm