问题详情

在窗体上画一个名称为Command1的命令按钮，然后编写如下程序： Dim SW As Boolean Function func(X As Integer)As Integer IfX＜20 Then Y=X Else Y=20+X End lf func=Y End Function Private Sub Form_MouseDown(Button As Integer，Shift As Integer，X As Single，Y As Single) SW=False End Sub Private Sub Form_MouseUp(Button As Integer，Shift As Integer，X As SinSle，Y As Single) SW=True End Sub Prinvate Sub Command1_Click() Dim intNum As Integer intNum=InputBox(””) If SW Then Print func(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25
C．输出45
D．无任何输出请帮忙给出正确答案和分析，谢谢！