问题 单项选择题

执行下列程序后,鼠标单击窗体,输出结果为

Private Sub Form_Click()

Print "Click";

End Sub

Private Sub Form_MouseDown(Button As Integer,Shift As Integer,X As Single,Y As Single)

Print "Donw"

End Sub

Private Sub Form_MouseUp(ButtonAs Integer,Shift As Integer,X As Single,Y As Single)

Print "Up"

End Sub

A.DownUpClick

B.ClickDownUp

C.DownClickUp

D.UpDownCliek

答案

参考答案:A

解析: 鼠标单击时,依次引发MouseDown、MouseUp和Click事件,即Click事件包含鼠标按下和放开事件。

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