Tim,
If you are using the Designer, you may refer to API guide for guidance on QueryParamCollection options [http://developer.cisco.com/static/cuae/2.4/2.4.1/Designer/Metreos.Types.Http.QueryParamCollection.html].
For 2.5, please refer to the following link:
[http://developer.cisco.com/static/cuae/2.5/2.5.1SR1/Designer/Metreos.Types.Http.QueryParamCollection.html]
If you are using C# you can also look at System.Web.HttpUtility.ParseQueryString.
It returns a NameValueCollection Just like the QueryParamCollection does in the designer.