在窗体上画一个命令按钮,其名称为Command1,然后编写如下程序: Function Func(ByVal x As Integer, y As Integer) y=x*y If y > 0 Then Func = x Else Func = y End If End Function Private Sub Command1_Click( ) Dim a As Integer, b As Integer a=3 b=4 c=Func(a,B) Print "a=";a Print "b=";b Print "c=";c End Sub 程序运行后,单击命令按钮,其输出结果为: ______。