These file record types are used in the DOS unit for file operations.
     Typed and UnTyped files use the FileRec definition while Text files
     use the TextRec definition.

                        Typed and UnTyped Files
       ------------------------------------------------------------

                        FileRec = Record
                           Handle   : Word;
                           Mode     : Word;
                           RecSize  : Word;
                           Private  : Array[1..26] of Byte;
                           UserData : Array[1..16] of Byte;
                           Name     : Array[1..79] of Char;
                        end;



                            Text File Record
       ------------------------------------------------------------

                        TextBuf = Array[1..127] of Char;
                        TextRec = Record
                           Handle     : Word;
                           Mode       : Word;
                           BufSize    : Word;
                           Private    : Word;
                           BufPos     : Word;
                           BufEnd     : Word;
                           BufPtr     : TextBuf;
                           OpenProc   : Pointer;
                           InOutProc  : Pointer;
                           FlushProc  : Pointer;
                           CloseProc  : Pointer;
                           UserData   : Array[1..16] of Byte;
                           Name       : Array[1..79] of Char;
                           Buffer     : TextBuf;
                        end;