reactos/drivers/input/mouclass/mouclass.h

   1 typedef struct _DEVICE_EXTENSION {
   2    BOOLEAN ReadIsPending;
   3    ULONG InputCount;
   4    PMOUSE_INPUT_DATA PortData;
   5    PDEVICE_OBJECT PortDeviceObject; // FIXME: Expand this to handle multiple port drivers (make *PortDeviceObject)
   6    GDI_INFORMATION GDIInformation;
   7 } DEVICE_EXTENSION, *PDEVICE_EXTENSION;