Learning to Use X11
There aren't many resources available for X11 programming, in particular not for beginners. Some useful ones are:
Christophe Tronche' X11 Pages: Includes a short tutorial covering essentially the same material that has been covered here. This site is interesting because the entire Xlib reference is available. I strongly recommend browsing it.
Brian Hammond's X11 Pages: Another personal X11 page with a tutorial, containing a little bit more information than Tronche's tutorial but less organized.
XFree86 Version 4.1.0: The official page for the current release of the open-source version of the X Window System. At the bottom of the page one finds the complete set of man pages.
Xlib Programming Manual by Adrian Nye. Volume 1 of the X Window System Series at O'Reilly. The book is wordy (it needs three chapters and almost 80 pages to cover not much more material than the present article), and the presentation is not always noted for its clarity. Nevertheless, it is probably still the standard introduction to X11 programming.
X Window Applications Programming by Eric F. Johnson and Kevin Reichard. One of the few truly introductory books on X11 programming but unfortunately out of print.
Philipp K. Janert has been programming for 15 years, both inside and outside of academia. He prefers C/C++ and UNIX but tries not to be religious about it. He holds a PhD in Theoretical Physics from the University of Washington, Seattle.
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