Monitoring Call Progress.

I’m presently developing a program for making local phone calls, using an ActiveX control called MSComm Although, the program can make phone calls but I want to be able to monitor the call progress. I have tested all the signals from the modem in the MSComm Event procedure but i could not monitor the call progress.I’m presently using Visual C++ 6.0 and i have also tested the Telephony API (TAPI)functions included in windows NT Operating System, but things are not working the way I expected.