protected: virtual LONG WindowProc( UINT message, UINT wParam, LONG lParam );
message
Specifies the Windows message to be processed.
wParam
Provides additional information used in processing the message. The parameter value depends on the message.
lParam
Provides additional information used in processing the message. The parameter value depends on the message.
Provides a Windows procedure (WindowProc) for a CWnd object. It dispatches messages through the window's message map.
The return value depends on the message.