Where and what is ASTACKINFO()? I am using VFP6 and I can't find this function in the help index. By the way I really thank you for your time and help. The issue at hand is very critical. The form that this optiongroup control is used on produces a change record for an Engineering Drawing here at our company. The optiongroup tells manufacturing what the disposition of the parts affected are. There are nine choices. One choice is USE AS IS another is SCRAP. You can see the problem if the control continues to have a mind of it's own.<g>