>Thanks for the help. I can get it working this way but how do you stop it from recalcing the column over and over again when you scroll. Which keeps increasing the running balance more and more. Any more help would be useful. Could you be a little more detailed with the solution maybe I am missing something. Again thanks.

Your method should take care of not increasing the running balance more and more.

Can you give us the details on what kind of calculation you need to have? Also, it might help if you give us the table implicated in the form and the relation between them.