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"Down"
End Sub
Private Sub Form_MouseUp(Button As Integer,Shift As Integer,X As Single,Y As Single)
Print "Up"
End Sub
A) DownUpClick
B) ClickDownUp
C) DownClickUp
D) UpDownClick
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。