Part VI describes C programming and Tcl. The goal of this section is to get you started in the right direction. For serious C programming, you will need to consult the on-line reference material for detailed descriptions of the C APIs.

Chapter 47 provides an introduction to using Tcl at the C programming level. It gets you started with integrating Tcl and Tk into an existing application, and with creating a Tcl extension you can dynamically load into tclsh or wish. Chapter 48 describes the build environment for Tcl so you can compile Tcl/Tk from the sources, and compile your own extensions. Chapter 49 presents a sample digital clock Tk widget implementation in C. This section ends with Chapter 50, which provides a survey of the facilities in the Tcl and Tk C libraries.