afx_msg void OnInitMenuPopup( CMenu* pPopupMenu, UINT nIndex, BOOL bSysMenu );
pPopupMenu
Specifies the menu object of the pop-up menu. May be temporary, and should not be stored for later use.
nIndex
Specifies the index of the pop-up menu in the main menu.
bSysMenu
TRUE if the pop-up menu is the system menu; otherwise FALSE.
Called when a pop-up menu is about to become active. This allows an application to modify the pop-up menu before it is displayed, without changing the entire menu.
This message-handler member function calls the Default member function. Override this member function in your derived class to handle the WM_INITMENUPOPUP message.
CWnd::OnInitMenu, CWnd::Default, WM_INITMENUPOPUP