Hi,
here's a explaination of the enter/exit events from the XFA specification (page 391).
enter, exit
The enter event fires when the field gains keyboard focus, whether caused by a user action
(tabbing into the field or clicking on it with the mouse) or by a script programmatically setting the
focus. It also fires when a new selection is made in a choice list, but this behavior can be inhibited.
See below.
The exit event fires when the field loses keyboard focus. It also fires whenever a new selection is
made in a choice list (followed by an enter event), but this behaviour can be inhitibited.
Hope this helps.
