This directory contains some extra examples, variations of the examples in the book. Bounce contains a Stage class that demonstrates the X double-buffering extension. Note that on some systems the X extension header, multibuf.h, does not automatically provide function prototypes suitable for C++. You may need to provide these yourself. TicTacToe has been reworked to use a one move lookahead to play a tougher game. SubMenus contains versions of classes described in the book that implement support for nested cascading menus based on the Cmd architecture. The file ch0.ps is an extra chapter in postscript form (cut from the book) that introduces C++. If you can't print postscript, ch0.txt is a text only version. Callbacks.ps is a postscript file that describes a slightly different approach to using callbacks with C++ classes. This material was also written for the book, but ended up on the cutting room floor. It may be interesting to some people. Callbacks.txt is a text-only version.