>Really by process of elimination. I knew it had to be in the DATA group of property and events. I had changed the mask with no results. I read the help file on the Sparse property and it fit that its control of the whole column could have some effect. Since it was not my code, making it work was my goal.

If you haven't solved the problem, would you mind posting the property settings of the offensive column and the contained textbox, along with any code that might be running in the textbox...