Context parameters in VSTS Web Tests

Question

Hi, Can anyone help me with the following question? How can a context parameter be used in a parameterized request?

I have created an extraction rule that populates a context parameter (say Param1). I also have parameterized a subsequesnt request and want to use this context parameter in that request. Eg. "{DetailArray:strUserID:xyz,intID:n{{Param1}} }" I am not sure if thats how I can do it? I would appreciate if some one can help with this question.

Thanks