Track when the Call is Terminated by Caller - D4PCI

Hi 

I am developing an IVRS solutions in VC++ 6.0 (using c language).  

I am facing one problem, needs a solution (thanks).

-- When caller calls on my IVRS application, it starts playing IVRS playback menu. suppose caller just disconnects the call. my application keep on playing the Playback audio files, 

-- i want to stop the ivrs call, so that channel is free for next caller, after the Caller Disconnects the call. 

kindly give me the code for the same. 

Thanks and regards