On the OnExit event of the specific field try
Me.requery
or
Me.refresh
or
Forms![MainForm]![Subform].requery
or
Forms![MainForm]![Subform].refresh
Try each one until you get the one that works for you. Might be that you need to refresh/requery both the main form and the subform. Remember to change MainForm and Subform for your actual form/subform names!
[This message has been edited by DBL (edited 03-14-2002).]
[This message has been edited by DBL (edited 03-14-2002).]