How to code a virtual serial port in windows Xp or Windows 7

I am seeking information on how to write my own code for a virtual serial port for windows Xp or Windows 7. Preferrably using Borland C++ builder.
Any useful information would be appreciated.
Please note that I know of commercial software available for this and information on such products is not what I need.

Thanks,

Roger
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Roger AlcindorAsked:
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Anthony2000Commented:
Have you seen this open source example: http://com0com.sourceforge.net/
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Roger AlcindorAuthor Commented:
Unfortuinately, I am looking for source code, not an application.
The link you suggest does not lead me to the source code ?
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George TokasCommented:
Hi there,
There is a component with source code at www.winsoft.sk named TComPort.
I am using it for VERY long time and never failed me.
There is a trial version to try.
The full one comes with full source code for around $30 I think.

George Tokas.
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Anthony2000Commented:
here is the link that includes the source code:
http://sourceforge.net/projects/com0com/files/com0com/2.2.2.0/
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Roger AlcindorAuthor Commented:
Hello George,
The Winsoft product looks like it's what I'm looking for.

Thanks and best regards,

Roger
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