Run Stored procedure immediately after save on Add or Edit form

As per the title

Is it necessary for me to have a custom button if I want to just run a procedure immediately a user has saved a record. (to include action on the information being added)

Or can I make use of the standard form events - eg after record added. I know how to use a custom button to call a stored procedure and run it.
Its just the standard from events don't seem to be three part.

Thanks in advance for any pointers