I'm trying to use the built-in campaign tracking functionality to do some custom processing. I need to access the code passed in the query string but it doesn't seem to appear in the API as I would expect.

If:
- The campaign code setting is the default "campaign", and
- I use the following URL "http://www.foobar.com?campaign=JellyBeans"

Shouldn't the value passed be available in CMSContext.Campaign? If not, where? Is there something I'm missing?

Thanks in advance!