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 BooleanFunction func(X As Integer) As IntegerIf X < 20 Then Y = X Else Y = 20 + X End If func = Y End FunctionPrivate Sub Form_MouseDown(Button As Integer, Shift As Integer, X As Single, Y AsSingle)SW = FalseEnd SubPrivate Sub Form_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single) SW = True End SubPrivate 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，如果在输入对话框中输入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
