>I have a dropdown combo box. The last item in the list displays right on top of some navigation buttons. When this item is selected the nav button gets clicked also. How do I prevent this? Thanks.

Could you disable the Nav Button in the ComboBox WHEN and then enable it in the VALID? If the Nav button is not always enabled there will be some work to do to determine the proper state and there may be a combination of methods better than WHEN/VALID, but I think this can work.

............Rich