Occurs before an application attempts to delete the active record.
Syntax:
property BeforeDelete: TDataSetNotifyEvent;
Description:
Write a BeforeDelete event handler to take specific action before an application deletes
the active record. BeforeDelete is called by Delete before it actually deletes a record.
Making use of this event an application might, for example, display a dialog box asking for
confirmation before deleting the record. On denial of confirmation, the application could abort the
deletion by calling the Abort procedure.