I don't typically use either (bindingsource/bindingnavigator), but you might be able to do something with the TextChanged event.

~~Bonnie



>I have a form using a bindingsource/bindingnavigator on a typed dataset.
>
>I have a BirthYear field and a DateofBirth field and a function to calculate the age based on those two values. I want to display the persons age on the form in a label or textbox.
>
>Where is a good place to call the function so that the Age is recalculated when either value changes or the person displayed changes?