Device Interfaces
In chapter 7, a primitive mechanism for extending the Dispatch interface is described. It relies upon a single user-mode call, DeviceIoControl, which allows specification of a control code that is generally device-specific. The remaining arguments of the Win32 API call specify separate input and output buffers. Of course, the structure and meaning of the buffers is code-dependent and relies upon a specification outside the scope of the I/O Manager or any other system component.
Interface Definition
With the introduction of Plug and Play for Windows 2000, Microsoft allows device drivers to extend a generic interface to user-mode code. An interface is a specification, or contract, between caller and implementer that is nothing ...
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