ThyElite Forums - Combo box help?

Im working on using a combo box with a webbrowser... this should be working...

Code:

Private Sub WebBrowser4_NavigateComplete2(ByVal pDisp As Object, URL As Variant)

Combo1.AddItem WebBrowser4.LocationURL

End Sub

But it adds the item more than once... usually 3 times. Any way I can make it so that if the item being added is already on the list, it doesnt ad it? And also, is there a way to make it so that it adds the item to the top of teh list, instead of the bottom?