I have a pageframe. In each pages I have to detect when a change has been made in one of the field on that page. I'll then update the "Date of the last change" field.

My question : What would be the best way to detect if a field was changed.

I'm thinking of first gather the values when I get in the page and then gather again when user leaves the page. If a change is detected then I update the date.

Am I on the right track or is there a better way to do this?

Is there a function (native) in VFP to compare values for the result of the two gather? Otherwise what do you suggest as the most efficient way to do this?