[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

[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

A

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。