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
If X＜20 Then
Y=X
Else
Y=20+X
End If
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 Single,Y As Single)
SW=True
End Sub
Private 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—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( )o
A) 输出0
B) 输出25
C) 输出45
D) 无任何输出
