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>Introduction</H1
><P
> It is a useful widget set complementary to GTK+ for creating
graphical interfaces for the X Window System.
It is licensed using the LGPL license, so you can develop
open software, free software, or even commercial non-free software
using GTK without having to spend anything for licenses or royalties.</P
><P
>GtkExtra is essentially an object oriented application programmers
interface (API). Although written completely in C, it is implemented
using the idea of classes and callback functions (pointers to
functions).</P
><P
>This document is a "work in progress". Please look for updates on CVS at
<A
HREF="http://gtkextra.sourceforge.net/"
TARGET="_top"
>http://gtkextra.sourceforge,net/</A
>.</P
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>I would very much like to hear of any problems you have learning GtkExtra
from this document, and would appreciate input as to how it may be
improved. Please see the section on <A
HREF="c241.html"
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