writing extended procs in Delphi for SQL Server

I'm finding lots of code samples for writing extended procs, but *all* of
them
do nothing with SQL. Hello or calculating free disk space are common
examples.
I'm writing a sp because I want to work with SQL data. How do I do
that from an xp?
Do I have to go back around through ADO?
I would think that ODS would have a method in the API to interact with
the data, but you can't tell that from the sample code I've found so far.

--
Thanks,
Brad.

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