The framework calls this member function after the CWnd object has returned a nonzero value from a OnQueryEndSession member function call.
The OnEndSession call informs the CWnd object whether the session is actually ending.
If bEnding is TRUE, Windows can terminate any time after all applications have returned from processing this call. Consequently, have an application perform all tasks required for termination within OnEndSession.
This member function is called by the framework to allow your application to handle a Windows message. The parameters passed to your function reflect the parameters received by the framework when the message was received. If you call the base-class implementation of this function, that implementation will use the parameters originally passed with the message and not the parameters you supply to the function.