Problem with Comm control (trying to make Caller ID app)

[baja_yu]

Hi everyone. Long time no see.
I need a little help with the Comm control. I found this topic with code for detecting Caller ID.

http://www.vbforums.com/showthread.php?t=103953

The problem is, when ever I try to run the code it errors on this line:

MSComm1.PortOpen = True

saying: Runtime error 8012. The Device is not open.

I have no idea how to solve this. Other options are all set correctly (Com port, etc)

[MartinLiss]

Does this help?

MSComm1.PortOpen = True
DoEvents

[RobDog888]

I assume that you designated which COM port and set the settings?

In your device manager do you have any yellow exclamation points on the port in question?

[David.Poundall]

Alternatively, what does hyperterminal say about the com port - does it recognise it as existing?

[RhinoBull]

I don't believe MSComm control supports CallerID at all.

[David.Poundall]

You have to have a modem capeable of detecting it as caller ID comes in between rings. You should see

RING
01753 678345
RING
01753 678345

In the receive string on the comm port. Alternatively on a ring you interrogate an S register on the modem for a number.

[RhinoBull]

Yes, a "capable modem" is a mandatory requirement, but MSComm control must also support this feature and I don't think it was designed for that purpose, though. Few years back I gave up on it and went for a third party to save time (and aggravations ) ...

[dglienna]

Here is a project that works on my machine, but we're having trouble deploying on my friends machine. It's from psc.

http://www.Planet-Source-Code.com/vb...48942&lngWId=1

You also need this to have it talk, as well as the SpeechTAPI module, unless you already have a \Windows\Speech folder on your system. I googled and found it.
It's also in the faq at the bottom of the link.

[radiomage]

While very simple to use MSComm control to "talk" AT commands to a modem, it is extreamly specifiic to Modem model & Brand.

For anything to be used more than once and /or on different systems, TAPI is the best choice. Unimodem or AT commands are too modem specific.

MS has some sample TAPI apps.

[RhinoBull]

I agree that TAPI library is the best ... there is however one little "problem" with it: very complex and difficult to use so it does require serious level of expertise in this area.

[radiomage]

If the portopen fails it is because either the port doesn't exist, you have it open already in your program or another application (or device driver) is using it.

[dglienna]

See if you can open it in HyperTerminal. Do you have any fax software running?
Something is probably using the port. Did my upload work for you?