Device Objects
When the PnP manager finds a device that the driver controls, it notifies the framework. The framework, in turn, calls the driver so that the driver can create and initialize the data structures that are required to manage the device. The most important of these is the device object.
The device object represents the driver’s role in managing the device. It contains status information and is the driver’s target for I/O requests that are directed to the device. Windows directs requests to the device object, not to the driver.
The device object contains device-specific information that the driver uses while handling I/O requests and managing the device. The device object also supports the callbacks that the driver implements to respond ...
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