单项选择题

单击命令按钮时，下列程序代码的运行结果为
Private Sub Command1_Click()
Print MyFunc(20, 18)
End Sub
Public Function MyFunc(m As Integer, n As Integer)As Integer
Do While m＜＞n
Do While m＞n:m=m-n:Loop
Do Whle m＜n:n=n-m:Loop
Loop
MyFunc=m
End Function