Postgres C functions documentation

On Fri, Jul 16, 2004 at 10:03:56AM +0200,
Najib Abi Fadel <nabifadel@usj.edu.lb> wrote
a message of 37 lines which said:

Is there any documentation explaning the C functions (syntax) used
in postgres.h library ??

http://www.postgresql.org/docs/7.4/static/libpq.html