xserver links

www.x.org-wiki

http://www.x.org/wiki/Development/Documentation/DocBookConversion

http://www.x.org/releases/X11R7.7/doc/index.html

http://www.x.org/docs/

http://tronche.com/gui/x/icccm/   

Inter-Client Communication Conventions Manual

http://tronche.com/gui/x/xlib/introduction/

http://www.sbin.org/doc/Xlib/chapt_01.html   

Xlib Programming Manual (O'Reilly & Associates, Inc.)

http://www.docin.com/p-353499959.html    A Practical Guide to X Window Programming Developing Applications with the XT Intrinsics and OSF Motif