Add only unique items to a listbox (no duplicates added). Fast and short without any loops.
Use this method to avoid adding an item to a ListBox that already exists. It's a lot faster and shorter than submissions that uses loops etc.
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ซอร์สโค้ด
Private Sub AddUnique(StringToAdd As String, lst As ListBox)
lst.Text = StringToAdd
If lst.ListIndex = -1 Then
'it does not exist, so add it..
lst.AddItem StringToAdd
End If
End Sub
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