Your answer is perfect...and thinking of it......it could actually be used like the intellisense feature. the Mozillla example u were implying means that it only checks to c if you're gettin' closer to any of the static choices available. But why have the choices static? isn't it possible to dynamically generate values in the listbox depending on the input in the textbox?
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One more thing....can't i have this listbox appear on normal Wnd and not a PlusWnd? something like this
Exmaple