对窗体编写如下事件过程: Private Sub Form_ Mouse Down(Button As Integer,Shift As Integer,X AS Single,Y As Single) If Button=2 Then Print "AAAAA" End if End Sub Private Sub Form _ MouseUp(Button As Integer,Shift As Integer,X As Single,Y As Single) Print "BBBBB" End Sub 程序运行后,如果单击鼠标右键,则输出结果为 ______。