Windows Driver Foundation (WDF)
Windows Driver Foundation (WDF) is the next-generation driver model for the Windows family of operating systems. WDF can help to reduce driver development time, contribute to greater system stability, and improve driver diagnosability and serviceability.
WDF defines a single driver model that supports the creation of object-oriented, event-driven drivers for either kernel mode or user mode. It simplifies driver development and maintenance by:
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Implementing common features.
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Providing intelligent defaults.
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Managing most interactions with the operating system.
With WDF, driver writers can focus on their device hardware, rather than on the operating system. WDF includes frameworks for the development of kernel-mode and user-mode drivers along with several driver verification tools.
More information about WDF, you can look at this URL http://www.microsoft.com/whdc/driver/wdf/default.mspx