Tracking code management via API?

We need to manage (add / edit / remove) tracking codes programmatically via the XML API. The documentation I have is incredibly unclear on how / if this is possible.

I see that we can access information on tracking codes with site.GetSite, but how can I add / edit them via the API?

Tracking codes are just text strings, you can specify them in a CreateMeeting/CreateEvent/CreateTrainingSession/etc.. you can then pull them back out with the history service..

Editing and Removing Tracking codes is not possible..

Ok, thanks Ryan. That makes enough sense. I'll see what I can do with that.

-- Matt