PFCB
CdLookupFcbTable(
  IN  PIRP_CONTEXT IrpContext,
  IN  PVCB Vcb,
  IN  FILE_ID FileId
  );

Routine Description:

    This routine will look through the Fcb table looking for a matching
    entry.

Arguments:

    Vcb - Vcb for this volume.

    FileId - This is the key value to use for the search.

Return Value:

    PFCB - A pointer to the matching entry or NULL otherwise.