主题：[求助]SelectedIndexChanged

SelectedIndexChanged代码:

Dim kwlb As WinForm.ComboBox = e.Form.Controls("ComboBox1")

If e.Sender.text = "成品库"  Then

    kwlb.text = 30

ElseIf e.sender.text = "外观不良品库"  Then

    kwlb.text = 31

End If

e.Form.Controls("TextBox3").Select-----希望在combobox1选择完，光标自动定位到testbox3文本框上，怎么没反应？