问题详情

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