The Cprog directory has the C sources from the book
and the makefiles for building on UNIX.

The build directory has a different sample extension and
the Makefiles and Project files for building on
Windows and Macintosh.

The guestbook directory has the pages and CGI scripts
from the guestbook example in Chapter 3.

The canvas_ui directory has a program I wrote long
ago to play with the Tk canvas.  Its print feature
only works on UNIX.