looking for library manager callbacks for Edit Menu Commands

Does Cadence provide any kind of call back or trigger event for when a
copy or delete is done on a cellview from inside of the library
manager? i found a trigger in the lib man for when the list is
updated, but as far as i can tell, there is no way of know what the
user just did to cause the update, or what libs/cells/views were
affected/created.

If not, i know you can create new menu items in the lib man, with your
own callbacks, but is there anyway to append a callback onto the
existing delete (or any other actions ) command. I'm trying to avoid
reinventing the wheel of creating their dialog boxes for such
commands.

It's suprising that there doesn't seem to be a way to get more
information about what lib man is doing with CV's, and what CV's it's
doing it with.

Thanks,
Kelly