Logging Library Feature Usage

I am trying to find out if SW executes some "event" when you added a Library Feature to a part model.  I would like to have our Programming department "tap" into this "event" to write some data to a log file, so we can track Library Feature usage and which ones.  Is this feasible?  What is the "event"?  Any information would be help.

Thank you,

SolidworksApi macros