NTSetSharedAccess(
  IN  tDEVICECONTEXT  *pDeviceContext,
  IN  PIRP            pIrp,
  IN  tADDRESSELE     *pAddress
  );
Routine Description:

    This Routine handles setting the shared access on the file object.

Arguments:

    pIrp - a  ptr to an IRP

Return Value:

    NTSTATUS - status of the request