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(By Val 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______。