>>>I would put no code in Valid, and look at using Click.
>>>In Click:
>>>
>>>This.Lostfocus
>>>
>>>to fire whatever code you have in your Lostfocus. Will that work?
>>
>>Won't the Click fire every time the user clicks on the box, even if it's not dropped down?
>
>What kind of box is it? There are two ideas in play here:
>
>1) The Click does not fire when user clicks on the "dropdown arrow" - so a normal selection can be made without any problems.
>2) Any other behavior (incremental search, e.g.) can be controlled in the Lostfocus by stopping exit with a NoDefault. I don't know the details of what you're doing, but the hope is that a combination of these two ideas will help...

I meant the textbox part of the Combobox. If the user clicks there, won't the Click Event fire?

I'm going to try some of these suggestions and see what happens.