The PEXlib Reference Manual is the definitive programmer's reference resource for PEXlib, containing complete and succinct reference pages for all the callable routines in PEXlib version 5.1. The content of the PEXlib Reference Manual stands, with relatively few changes, as it was created by the X Consortium.

The PEXlib Reference Manual is a companion volume to the O'Reilly and Associates' PEXlib Programming Manual, written by Tom Gaskins. The Programming Manual is a thorough tutorial guide to PEXlib, and includes valuable reference features. Together, these books offer the most complete and accessible documentation available for PEXlib version 5.1.