Monitor a COM port already in use.

Posted by rross on Stack Overflow See other posts from Stack Overflow or by rross
Published on 2010-05-17T14:08:13Z Indexed on 2010/05/17 14:10 UTC
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c#

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serial-port

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com

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windows-xp

Is it possible to read from a COM port already in use on Windows XP? I would like to see the communication between some software and a device plugged into a serial device. I wrote a small program using C# to monitor the COM, but once it's in use by the other device it will not let you open it again. How can one monitor a COM port already in use? I'm open to 3rd party software. Thanks

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