The Exit event is triggered when the user leaves a field that currently has the input focus. This event is triggered before the current field actually loses the input focus. It is also triggered whether or not the user changed any data in the field. Therefore, if you want to execute an event only when the user actually changes data (for validation purposes, for example), use the SetValue event.

fieldname is optional if you specify this event in a field script. The field must have a focus behavior of either FT_TABTO or FT_TAKEFOCUS to receive an Exit event.