Re: Com Ports
From: Joseph M. Newcomer (newcomer_at_flounder.com)
Date: 11/21/04
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Date: Sun, 21 Nov 2004 00:50:58 -0500
Yes, that's what is supposed to happen. Why would you expect anything different? And in
particular, why do you think opening a second connection on a port, even if it were
possible, would deliver you a copy of the incoming data? There's no way that could
possibly make sense. That makes as much sense as opening a file and seeing the data that
other programs read as they read it.
You need a filter driver; as far as I know, that's what portmon and similar programs do.
joe
On Thu, 18 Nov 2004 18:36:05 +0200, "Alexl Lisbaron" <stam_ss@mail.ru> wrote:
>Hi All,
>Please advice me ,
>how I can read(spy) data from Com Port if it ,already,was opened by another
>application.
>
>I tried to open Com Port with CreateFile but I received error "Access is
>denied"
>
>What I should do?
>
>Thank you in advance
>Alex
>
Joseph M. Newcomer [MVP]
email: newcomer@flounder.com
Web: http://www.flounder.com
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