In short, no (but it may not be an issue). If your users are clicking on the list box and then selecing an item in that list, then they are interacting with the control. Any time the user interacts with a control, it's going to have focus. That's just how it works.
But, you can always force the focus back to the textbox after the item is selected. It all depends on what behavior you are trying to get. If all you're wanting is the focus to be back on the textbox once the user has selected the item, then it shouldn't be a problem. You just have to call the focus() method on the textbox (I think that's what it's called, it's been a while since I did win forms) from inside the event that fires when the user selects an item from the list box (probably something like like the itemSelected event).
Damon Armstrong, Technology Consultant
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