Thanks, worked a treat. A nice simple solution.

Is there anyway of returning the value of an option group (in access 2003) back to what it was before any entry was made? I frequenty find people are wishing to remove there answer but with an option group it seems as if once you have made a choice, although you can change the choice, there is no way of returning it to its original state of having nothing selected. I know I can do this with a combo box by simply deleting the entry but I was hoping...