IntPtr[] handles3 = BFS.Window.GetVisibleWindowHandlesByMonitor(3);        
            IntPtr[] handles2 = BFS.Window.GetVisibleWindowHandlesByMonitor(2);
    
        
        // loop through window handles and send each to the next monitor
        for (int j = 0; j < handles2.Length; j++)
            BFS.Window.MoveToMonitor(3, handles2 [j]);

        for (int j = 0; j < handles3.Length; j++)
            BFS.Window.MoveToMonitor(2, handles3 [j]);