InsertMenu
Inserts a menu item at a specified position(internal menu)
Inserts a menu item at a specified position(resource menu)
BOOL InsertMenu( LPCTSTR lpcszNewItem, UINT nPosition, Function fnHandler, UINT nFlags = MF_STRING )
BOOL InsertMenu( UINT nPosition, UINT nFlags, UINT nIDNewItem = 0, LPCTSTR lpcszNewItem = NULL )
returns true if successful else false.
Control.h