File/CFile
CFile               Class See ::/Demo/Dsk/DataBase.HC.
FBlkRead            Funct Read [nth,n+cnt) blks of file.
FBlkWrite           Funct Write [nth,n+cnt) blks of file.
FClose              Funct Close CFile, updating directory.
FOpen               Funct Allows flags "r","w","w+". "c" for contiguous.
FSize               Funct Report size of opened file in bytes.