Help understanding libespeak?

[Little Bobby Tables]

Hey everyone! I need to use this software for a plugin I'm writing called espeak http://espeak.sourceforge.net/ which is both a command line text to speech tool and a text to speech library written in c. i want to use the library, but I cant find any documenation on it, save the header file, which doesn't really help me. Can someone with any experience with this walk me through a basic example?