drivers/input/psaux/psaux.h

   1 typedef struct _DEVICE_EXTENSION {
   2
   3   PDEVICE_OBJECT DeviceObject;
   4
   5   ULONG ActiveQueue;
   6   ULONG InputDataCount[2];
   7   MOUSE_INPUT_DATA MouseInputData[2][MOUSE_BUFFER_SIZE];
   8
   9   CLASS_INFORMATION ClassInformation;
  10
  11   PKINTERRUPT MouseInterrupt;
  12    KDPC IsrDpc;
  13 } DEVICE_EXTENSION, *PDEVICE_EXTENSION;