How this book is organized

This book contains information about:

• Tcl - tool command language, including descriptions of the language, command syntax, and variables and libraries used by Tcl.
• TclX - the Extended Tcl language, describing the extensions provided by Extended Tcl 7.3b. This chapter also provides a complete list of TclX commands.
• IXI Visual Tcl - graphical scripting language, describing program structures, callback data structures, resource files, system files, and class options.
• All graphical commands included with IXI Visual Tcl.
• All non-graphical commands included with IXI Visual Tcl.

Developers familiar with using Tcl and Extended Tcl may find it useful to skip ahead to the section IXI Visual Tcl - graphical scripting language, or directly to the command references.