C Interfaces and Implementations: Techniques for Creating Reusable Software is the best thing I've seen on the topic, personally. http://www.amazon.com/Interfac

C Interfaces and Implementations: Techniques for Creating Reusable Software is the best thing I've seen on the topic, personally. http://www.amazon.com/Interfaces-Implementations-Techniques-Creating-Reusable/dp/0201498413 http://www.amazon.com/Interfaces-Implementations-Techniques-...