I've moved into a new home - no key for the security /screen door . I've removed the handle and this frees the lock and barrel section to slide up and down within the door frame BUT I don't know how to get it out now . There don't appear to be any other screws.
It is a Whitco lock and probably 15 years old approx

Joan, June 2013

See question above

Len, June 2013