C# + TAPI - Answer detection problem

Hi, I'm writing a C# program that uses TAPI to make a telephone call. Setps: 1 - Call a specified number. [OK] 2 - Wait for answer or busy signal. [PROBLEM] 3 - Play a wav file. [OK] 4 - Hang up. The problem is in step 2. It can't detect whether someone answered the phone or the line was busy. Please see attach project. Only need fix that BUG!!

## Deliverables

1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done.

2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables):

a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment.

b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request.

3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement).

## Platform

Windows / C#

C# Programming Engineering Microsoft MySQL Odd Jobs PHP Software Architecture Software Testing Windows Desktop

Project ID: #2900957

About the project