Writing Windows Virtual Device Drivers
  by David Thielen & Bryan Woodruff
    Addison-Wesley Publishing Company
    ISBN: 0-201-62706-X

Very simply - if you write Windows programs you will probably need this book.
If Windows has ever limited one of your programs capabilities, you definitely
need this book.

Includes complete source code to Win-Link!


From the back cover of the book:

Virtual device drivers (also know as VxDs) allow Windows developers to access
undreamed-of power in their programs.  If you want to write programs that
have direct access to hardware devices, can interface to vital CPU functions,
or can take over parts of the operating system, the welcome to the world of
VxDs.

Written by experts in the field, David Thielen and Bryan Woodruff, Writing
Windows Virtual Device Drivers introduces the concepts of virtual device
drivers and shows how to write VxDs in both C and assembly language.  Fully
commented complete working source code examples demonstrate how to write a
VxD to talk to any hardware device and show the wealth of tricks you can
perform with VxDs, including interprocess communication.

An extensive appendix provides an encyclopedic reference for the the Virtual
Machine Manager, the preemptive multitasking kernel at the heart of Windows,
and system VxD services and macros.  The accompanying disk includes VxD-lite,
Microsoft's toolkit for building generic virtual device drivers.