COM1, how to detect if in use?

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#351

From: JENGLUNG LIN
Date: Mon, 10 Aug 1992 15:25

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I have a TSR program to use for comm purpose. If running another comm program,
my TSR will be malfunction because two program want to write to com1 at once,
is there a way to detect if com1 is open and return 'access denied' code?

Thanks in advance for any hint.

-- 
LIN,JENGLUNG
P.O. Box 32768, Georgia Institute of Technology, Atlanta Georgia, 30332
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Path: arc1-ca.pugleaf.net!sparky!uunet!gatech!prism!gt2768b
From: gt2768b@prism.gatech.EDU (JENGLUNG LIN)
Newsgroups: comp.os.msdos.programmer
Subject: COM1, how to detect if in use?
Message-ID: <65517@hydra.gatech.EDU>
Date: 10 Aug 92 15:25:38 GMT
Distribution: usa
Organization: Georgia Institute of Technology
Lines: 11