Occurs before an application posts changes for the active record to the database or cache.
Write a BeforePost event handler to take specific action before an application posts dataset changes to the database. BeforePost is triggered when an application calls the Post method. Post checks to make sure all required fields are present, then calls BeforePost before posting the record.
An application might use BeforePost to perform validity checks on data changes before posting them to the database. If it encountered a validity problem, it could call Abort to cancel the Post operation.