MenuStrip里Menu的index如何设

MenuStrip里Menu的index怎么设
Public   Sub   mnuT_Sp_Click(ByVal   eventSender   As   System.Object,   ByVal   eventArgs   As   System.EventArgs)   Handles   mnuT_Sp.Click
        Dim   Index   As   Short   =   mnuT_Sp.GetIndex(eventSender)
End   Sub
总是出错，“mnuT_Sp”的Index值没有设，请教一下各位

[解决办法]