Opening COM port twice

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#12598

From: Denville Longhurst
Date: Sat, 29 Nov 2003 16:01

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Hi

Is it possible for two applications to open a COM port simultaneously?  I
have to share data coming in on a port with another application (both make
different use of the data).  I have tried CreateFile using FILE_SHARE_READ
(in both apps), and using both overlapped and non-overlapped operation, but
in all cases the second application gets File Access Denied.

If it is not possible conventionally, how do I write something like a port
monitor to achieve the same result ??

Many thanks for any help,

Denville.

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From: "Denville Longhurst" <Denville@metco.co.uk>
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Subject: Opening COM port twice
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