Chapter 44. C Programming and Tcl
This chapter explains how to extend a Tcl application with new built-in commands. Tcl 8.0 replaces the original string-based command interface with a more efficient dual-ported object interface. This chapter describes both interfaces.
Tcl is implemented in a C library that is easy to integrate into an existing application. By adding the Tcl interpreter to your application, you can configure and control it with Tcl scripts, and with Tk you can provide a nice graphical interface to it. This was the original model for Tcl. Applications would be largely application-specific C code and include a small amount of Tcl for configuration and the graphical interface. However, the basic Tcl shells proved so useful by themselves ...
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