... IN PUNICODE_STRING DeviceName OPTIONAL, IN DEVICE_ TYPE DeviceType, IN ULONG DeviceCharacteristics, IN BOOLEAN Exclusive, OUT PDEVICE_OBJECT *DeviceObject ); Parameters ... their device objects. For more information, see Named Device Objects. DeviceType Specifies one of the system-defined FILE _DEVICE_ XXX constants that indicate the type of device (such as FILE _DEVICE_ DISK, ... their AddDevice routines. DeviceExtensionSize Specifies the driver-determined number of bytes to be allocated for the device extension of the device object. The internal structure of the device...