UINT GetMenuItemID( int nPos ) const;
nPos
Specifies the position (zero-based) of the menu item whose ID is being retrieved.
Obtains the menu-item identifier for a menu item located at the position defined by nPos.
The item ID for the specified item in a pop-up menu if the function is successful. If the specified item is a pop-up menu (as opposed to an item within the pop-up menu), the return value is -1. If nPos corresponds to a SEPARATOR menu item, the return value is 0.
CWnd::GetMenu, CMenu::GetMenuItemCount, CMenu::GetSubMenu, ::GetMenuItemID