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From: ZRWA001%DTUZDV1.BITNET@wiscvm.wisc.EDU
Newsgroups: comp.lang.pascal
Subject: Re: DOS file handles in TURBO
Message-ID: <9466@brl-adm.ARPA>
Date: Thu, 24-Sep-87 06:35:23 EDT
Article-I.D.: brl-adm.9466
Posted: Thu Sep 24 06:35:23 1987
Date-Received: Sat, 26-Sep-87 11:17:54 EDT
Sender: news@brl-adm.ARPA
Lines: 22

Turbo pascal keeps the file handle in the filevariable. Example:
instead of     VAR DAT:FILE OF ...
you can write:
               VAR DAT:RECORD CASE INTEGER OF
                        1:(FIL:FILE OF ...);
                        2:(HANDLE:INTEGER;
                           RECORDLENGTH:INTEGER;
                           BUFFEROFFSET:INTEGER;
                           BUFFERLENGTH:INTEGER;
                           BUFFERPOINTER:INTEGER;
                           BUFFEREND:INTEGER;
                           PATH:ARRAY12..75!OF CHAR;);
where HANDLE is the file handle used by DOS or $FFFF if file is closed and
PATH is an ASCIIZ string of the full filename.

When you close a file with the DOS call you have to set the HANDLE in the
file variable to $FFFF and perhaps the BUFFERPOINTER to BUFFEROFFSET.
I hope this helps but I haven't tested this.

Helmut (ZRWA001@DTUZDV1.BITNET)

P.S. What's about INFO-PASCAL BITNET side after the shutdown of WISCVM ??