Duplicates in a ListBox

What's the easiest way to find duplicates in a ListBox and remove them?

I think it will be better to find the diplicated before you enter them in the ListBox.
Where does the ListBox data come from ?

My program adds items to the listbox from a file that the user can edit.

the fastest way to check before you add is the use of sendmessage

VB Code:

Option Explicit
Private Declare Function SendMessageString Lib "user32" Alias "SendMessageA" _
(ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As String) As Long
Const LB_FINDSTRINGEXACT = &H1A2
 
'------------------------------------------------------
'then part of the sub adding the strings
 
If SendMessageString(List1.hwnd, LB_FINDSTRINGEXACT, -1, ByVal The_string_to_add) = -1 Then
 List1.AddItem The_string_to_add
End If

casey.

...bearing in mind that the search isn't case sensitive :p

chem

That's okay all the items are all automatically converted to upper case anyway. Thanks!