As a pointer to those that might find it helpful (though you'll have to buy the magazine), there's an article on a stream class in C++ that allows you to call perl code in the Jan 2002 issue of the C++ Users Journal. The article focuses mostly on the data translation from C++ to perl data types and how to arrange the stream class to get data back instantly.

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Dr. Michael K. Neylon - mneylon-pm@masemware.com || "You've left the lens cap of your mind on again, Pinky" - The Brain
"I can see my house from here!"
It's not what you know, but knowing how to find it if you don't know that's important