Chapter 12 talks about services. The different directories contain
different example services. The TOOLS directory contains the tools
you need to install and remove services.

simple - the simplest possible service, it beeps every two seconds
logon - a logon announcement service that uses a separate program to detect logons
logon2 - A logon announcment service that uses a two-service EXE to automatically
         detect and announce logons
rpcsvc - An RPC server embodied in a service
tools - Tools for services: installation, removal, starting, etc.