Introduction - If you have any usage issues, please Google them yourself
I would like to create a MDI window interface, but found them cumbersome to use VC to achieve, and to raise lots and lots of RUNTIME_CLASS, but can not be achieved in the main window to add options. That generates a OUTLOOK main window, in the main window and then adds a number of the document window (like the OFFICE of the multi-document the child window). Thus, writing this CMDIChild classes.