Function InsertMenu 

pub unsafe extern "system" fn InsertMenu(
    hmenu: *mut c_void,
    uposition: u32,
    uflags: u32,
    uidnewitem: usize,
    lpnewitem: *const u16,
) -> i32

#68 InsertMenu

inserts a new item before the item specified in the uiPosition parameter as determined by uiFlags