![[填空题] 编写如下代码： Dim Flag As Boolean Private Sub Form MouseDown (Button As Integer, Shift As Integer,](http://www.mshxw.com/aiimages/31/250992.png "[填空题] 编写如下代码： Dim Flag As Boolean Private Sub Form MouseDown (Button As Integer, Shift As Integer,")
[填空题] 编写如下代码： Dim Flag As Boolean Private Sub Form MouseDown (Button As Integer, Shift As Integer, X As Single, Y As Single) Flag = True End Sub Private Sub Form MouseMove (Button As Integer, Shift As Integer, X As Single, Y As Single) Flag = False End Sub Private Sub Form_ MouseUp (Button As Integer,Shift As Integer, X As Single, Y As Single) If Flag = False ThenPrint "DDDD" End If End Sub程序运行后，如果想在窗体上输出DDDD，则应执行的操作为______ 。
参考答案：
按下鼠标左键或右键同时松开问题解析:
解析无
