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From: stasica@boulder.Colorado.EDU (Master, to you)
Newsgroups: comp.sys.ibm.pc.programmer,alt.msdos.programmer
Subject: Turbo Pascal, Hayes modems
Message-ID: <18508@boulder.Colorado.EDU>
Date: 16 Mar 90 23:36:07 GMT
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Organization: University of Colorado at Boulder
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I was wondering if there is any way in Turbo Pascal to close all files that
have been opened during the execution of a program.  (i.e., there are a lot
in this program).  I know there is the provision that all files will be
closed once program execution has ended, but is there any way to do this
during run-time?
In experimenting with this it seems you can open the same file multiple times.
Is this true, and if so, what is the purpose?

By the way, as far as I know, there is no busy register in a Hayes compatible
modem.  An easy way to tell if the place you're calling is busy is to check
the result codes sent back from your modem...either verbal or numerical.