假定编写了如下事件过程: Private Sub Form_MouseDown(Button As Integer,Shift As Integer,X As Single, Y As Single) If Button=2 ThenPrint "aaaa" End If End Sub 程序运行后,为了在窗体上输出“AAAA”,应按下的鼠标键为
单选题
假定编写了如下事件过程: Private Sub Form_MouseDown(Button As Integer,Shift As Integer,X As Single, Y As Single) If Button=2 ThenPrint "aaaa" End If End Sub 程序运行后,为了在窗体上输出“AAAA”,应按下的鼠标键为