[单选题]

编写如下事件过程: Private SubForm_KeyDown(KeyCodeAsIntege《ShiftAsInteger',) If (Button And 3)=3 Then Print"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 ______。

A.左

B.右

C.同时按下左、右

D.按什么键都不显示

参考答案与解析:

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