Thank you very much. When I placed the textboxes on the form originally a "1" was added to each name ie IntCost1 etc although the field in the table is called IntCost. If I remember correctly I were unable to change the name on the form. In the object list the correct name is "THISFORM.IntCost1" etc.

I must use "THIS" in an object that has the focus and "THISFORM" in a method that does not have the focus. Is my assumption correct?

Thanks again for your help. It is really appreciated.

Petrus.