The samples for Chapter 15 are:

IOSCaller  -- (Non-working VxD) shows two different ways for an IOS
              "client" to start a block-device I/O request.

IOSMonitor -- (VSD and Win32 app) shows how to write a Vendor Supplied
              Driver and associated applet for investigating the
              inner workings of the IOS.

PortDriver -- (VxD) shows how to write a port driver for a RAM disk.
