I have a CFGrid that's working great, one additional enhancement would be the
icing on the cake but I don't know how to do this.

One column in my CFGrid is populated with checkboxes, if the checkbox is
selected then the item is approved, if not selected then it is not approved.
What I want to do is when a checkbox is selected (= approved) then in another
column show the date of the approval.

Can this be done? How?