编写如下事件过程: Private Sub FOrm_ MouseDown (Button As Integer, Shift As Integer, X As Single, Y As SinglE)If Button = 2 Then Pint 'AAAA' Then End If End Sub Private Sub Form_ MouseUp (Button As Integer, _ Shift As Integer, X As Single, Y As SinglE)Print 'BBBB' End Sub程序运行后,如果在窗体上鼠标右键,则输出结果为______。