Is it possible to create a virtual COM for a device using Microsoft stack?
Is it possible to determine the related number (COM no.)?

Thanks!

On Wed, 11 Jan 2006 11:59:38 +0100, "Omar"
<ocostantin_NOSPAM_@texa.it> wrote:

I don't quite understand the statement. In this context to me virtual
could mean different things.

IIRC, you're always given a handle/pointer to the COM object by some
COM class factory type function or interface. But I suppose it could
be done. That's if I am even close to understanding your question.

Like Johnny Five: "I need more input." :-) Perhaps post some code or a
more indepth explanation.

JustBoo wrote:
I think the OP means "COM" as in "communications port" (e.g., COM1).
Still, I have no idea what the answer to the OP's question is, and
I agree that it could use a little clarification into exactly what
the OP is trying to accomplish.

David

"David Jones" <ncic@tadmas.com> ha scritto nel messaggio
news:S1hxf.53609$ih5.34609@dukeread11...
Sorry for my bad explanation...
I need to open a virtual serial communication port (e.g. COM1) for a device
using Bluetooth (basing my application on Microsoft stack). I've already
realized a C++ application that opens many virtual communcation ports for
several devices using Widcomm stack.
How can I use Microsoft stack to open virtual serial communication ports?
The target operating system is Windows XP Professional SP2.
Thanks...

On Thu, 12 Jan 2006 08:26:20 +0100, "Omar"
<ocostantin_NOSPAM_@texa.it> wrote:
Doh! I thought you meant Component Object Model. :-)

Search MSDN with this search term (with quotes):

"Serial Communications in Win32"

I'm still not sure about the "stack" thing. Do you mean TCP stack?
That would be Sockets.

Try "DCB" == Device Contol Block. That's the way I've done serial comm
in Windows.

From MSDN:
"The DCB structure defines the control setting for a serial
communications device."
That's how you would get (and set) the port number.

Good Luck.

Omar wrote:

CreateFile("COM1", GENERIC_WRITE | GENERIC_READ, 0, NULL,
OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL);

ReadFile/WriteFile to do I/O, then CloseHandle when done.

HTH,

David

"JustBoo" <JustBoo@BooWho.com> ha scritto nel messaggio
news:8upcs1d7vvc5v8t1d0ddr5lij416v48jgg@4ax.com...

I have to "link" the virtual serial communication port to a specific device
via Bluetooth.
Using Widcomm Bluetooth stack I can look for devices and services and create
the link between a COM port and a device.
For example, I can create a "link" between COM7 and the serial port service
of a specific device.
Now I have to do the same using Microsoft Bluetooth stack...
I can create a virtual serial communication port and "link" it to a device
manually.
In my C++ application, I can open this virtual serial communication port
using CreateFile.
The problem is that I can't create and link the virtual serial communication
port via C++ code.
Can you (...both of you) help me?
Thanks...

On Fri, 13 Jan 2006 09:00:14 +0100, "Omar"
<ocostantin_NOSPAM_@texa.it> wrote:

Sorry, I don't know the Widcomm product at all. Can they give you
support?

You write about the Widcomm bluetooth stack. What creates this stack?

<wild assumption>
I would think there would be a library or *some kind* of
programmatic interface to their product. That is, a set of functions
or objects in C or C++ (even VB or the COM I was talking about)
that you use to "get at" the functionality of their product. If you
are expected to do this without said library / interface then it is
a very, umm, unique product indeed.

Something like:
bool ConnectDevice( int deviceID, int commPortNbr );
</wild assumption>

Do you have something like this?