This manual is the programmer's guide to the Tix library. It takes you though a step-by-step tutorial about the different widgets and functions available in the Tix library. It also covers how to write new widgets using the Tix Intrinsics objecr-oriented programming interface. The accompanying Tix Reference Manual is a collection of the Tix manual pages. It describes all the options and other details of the Tix widgets and functions.