在窗体上画一个名称为Coramandl的命令按钮，然后编写如下程序； Dim SW As Boolean Function func(X As Integer)As IntegerIf X＜20 Then Y=XElse Y=20+XEnd Iffunc=Y End Function Private Sub Form_MouseDown(Button As Integer,Shift As Integer, X As Single, Y As Single)Dim a As BooleanSW=False End Sub Private Sub Form_MouseUp(Button As Integer,Shift As Integer, X As Single, Y As Single)SW=True End Sub Private Sub Command1_Click()Dim intNum As IntegerintNum=InputBox("")If SW Then Print flmc(intNum)End If End Sub 程序运行后，单击命令按钮，将显示一个输入对话框，如果在对话框中输入25，则程序的执行结果为
A．输出0
B．输出2
C．输出45
D．无任何输出
