I am creating a form from a paper form that has a special need. I have a grid, and a textbox for every 3 rows in the grid. What I need to do is total the last field from every 3 rows and put the answer in the textbox. As the grid is scrolled,3 rows at a time, the value in the textbox needs to be updated for the correct 3 rows. I am using VFP30 for MAcintosh. Any suggestions on how to do this?