VB pager

I am trying to create analphanumeric pager in VB. I can do it based on a timed event to send the page, but I'd rather send the page when the phone is actually answered. How do I know when the call is answered before I send the page?

You can use the TAP protocol to call a paging service server which is a different number than the pager. With TAP, you use the oncomm event to wait for the greeting message "ID=" before sending the rest of the messgage. You would also need to keep track of state to complete the transaction according to TAP.

[JSRich]

Do you know where I can get some VB source code for alphanumeric paging using the TAP protocol syntax, commands, etc.?