What is VxD driver and what is the main purpose for it?

What is VxD driver and what is the main purpose for it?
and where can I find a full documentation ?
MohdAsalahAsked:
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jhanceConnect With a Mentor Commented:
VxDs are specific to Windows 95, 98, and ME and stand for Virtual Device Driver.  These are drivers that are loaded and used by the system to interact with hardware devices or to create "virtual" hardware out of software.

You will find VxDs documented in the Windows 9x DDK and you will find many examples there.  There are book written on them and I think the best one is Karen Hazzah's book titled " Writing Windows VxDs and Device Drivers" published by R&D Books.

VxDs are now obsolete as no current Windows supports them.  NT4, 2000, and XP do NOT use VxDs.

So unless you are just interested or are in the position of supporting Win9x systems for drivers, you'd be better off learning about WDM (Windows Driver Model) drivers.
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