GridView Sorting/Paging

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I've been playing around with the GridView and for the most part am able to
achieve most of what I need to. I am having just one problem and that's with
the Sorting and Paging options. If I use a <asp:sqlDataSourcesorting and
paging work fine, but when I popluate the GridView via a DataSet via
Code-Behind, the sorting and paging do not work at all.

I don't want to use sqlDataSource because my DataSets will be creating using
Stored Procedures, which sqlDataSource does not appear to support.

What must I do to get the GridView to sort and page like it does when using
the sqlDataSource instead?