struct CdrThdRec {
        SInt8           cdrType;        record type (SignedByte)
        SInt8           cdrResrv2;      reserved (SignedByte)
        SInt32          thdResrv[2];    reserved (ARRAY[1..2] OF LongInt)
        SInt32          thdParID;       parent ID for this directory (LongInt)
        Char            thdCName[32];   name of this directory (Str31)
};
