This file came from the Caller ID FAQ at http://www.ainslie.org.uk/callerid.htm

Subject: Re: Caller ID access? 
Author : omegatechware
Email  : omegatechware@home.com
Date   : 1998/11/10
Forums : comp.lang.basic.visual.misc 

On Sun, 08 Nov 1998 20:21:01 -0600, Marc Mitchell
<marcm@controlsolutionsltd.com> decided to enlighten us with :

>Ok,
>    I know that you must have a third party control (well, that at least
>the VB syntax won't handle port IO) to get access to ports. Can anyone
>point me in the direction of where I could find information on getting
>CallerID information from the modem? Any help would be greatly
>appreciated.
>
>
>
>Marc
>
Marc,
        If you are using a 32 bit version of VB, you can use the
MsComm control, which comes with (I believe) all versions of VB above
Standard Edition. Assuming that you'll use the MsComm control :

        Set the port number
        Open the port
        Send the string "ATVCID=1" & Chr(13) to the port, which turns
on Caller ID support.
        Check the incoming data for error messages
        If OK, wait for "RING" in the incoming data stream.
        Once "RING" has been detected, start to save the data stream
to a string variable, not finishing until you're certain you've
retrieved all of the ANI data in the stream. Caller ID services
USUALLY send the ANI data between the second and third RING, but it is
not a standard.
        Parse the string variable, looking for the following :
"DATE=", "TIME=", "NMBR=", and for certain 'enhanced' services,
"NAME=". Each field is separated from the others by either a chr(10)
or a chr(13), or both. The order of the fields may vary.
        If you need to turn off Caller ID support, send "ATVCID=0" to
the port.
        Don't forget to close the port before your application exits.

        After that, you should know what to do.

        If any of this information is incorrect, I apologize in
advance. I'm taking this from memory, so bear with me.

        Alternatively, you can (and should) do some research into the
various TAPI commands, which will allow you to run your app
concurrently with other TAPI compliant programs, and not have to worry
about the problems like "port already open", etc ...

        HTH,
        Jeremiah D. Seitz
        Omega Techware
        Solutions for small businesses
        http://members.home.net/omegatechware