在窗体中添加命令按钮cmd 并编写如下程序：Funtion panduan(x As Integer y As Integer) As Integ

在窗体中添加命令按钮cmd，并编写如下程序：

Funtion panduan(x As Integer,y As Integer) As Integer

panduan=IIF(x＞y,x,y)

End Function

Private Sub cmd_click()

Dim a As Integer,b As Integer

a=4

b=7

MsgBox panduan(a, b)

End Sub

打开窗体单击命令按钮，消息框中输出的结果为【 】。

请帮忙给出正确答案和分析，谢谢！