%Request.GetParameter()

I was looking for some documentation on how the %Request.GetParameter() returns a value. Specifically, we are looking into develop a custom Remote Worker Activity Guide with a different Questionnaire. I cloned the delivered AG Composer Category and then set the Parameter Value = <our custom Questionnaire Code>.

In the delivered PreBuild, I see the following code that is to return the appropriate Questionnaire.

EOQF_WRK.EOQF_QSTNR_CODE.Value = %Request.GetParameter("EOQF_QSTNR_CODE");

However, the above is returning the delivered Questionnaire and not my custom one. This was confirmed in the Trace file.

Question is: How does the GetParameter figure out how to get the value for EOQF_QSTNR_CODE? If I can get any insight on where to look for this, that should help me resolve my issue. I appreicate any help the community can provide.