Voice Codec?

Hi all, Looking for a fast, efficicent and easy to use voice codec. Or help getting Speex working! I had a look at the Speex one and couldnt get it to work. I tried to make sure that all the right header files were included (e.g. ogg etc) but still had some external errors for ogg. Maybe I didnt link the library? If so whats it called and where should i put it? Otherwise has anyone got any other ideas what I could use? I am making a simple voice chat program which is almost complete. At the moment it uses raw .wav files so I kinda need to compress them somehow before they are sent and decompress them at the other end. Thanks in advance for anyone whoe can help! Cheers