void OnEndOfStream(AudioStreamImpl obj)
 {
     Program.inf.BeginInvoke((System.Windows.Forms.MethodInvoker) delegate
     {
         lstActiveStreams.Remove(obj);
     });
 }
        ZelloPTTLib.IAudioStream ZelloPTTLib.IAudioMessagePlayback.MessageInBegin(ZelloPTTLib.IMessage pMessage)
        {
            AudioStreamImpl rv = new AudioStreamImpl(cntMessages);

            if (false == String.IsNullOrEmpty(savePath))
            {
                WriteWav ww = new WriteWav(GetSaveFileName(pMessage));
                if (ww.Valid)
                {
                    rv.AddSink(ww);
                }
            }
            if (bForwardAudio)
            {
                WavBuffer wb = new WavBuffer();
                wb.AudioRcvStarted += dlgt;
                rv.AddSink(wb);
            }
            cntMessages++;
            lstActiveStreams.Add(rv);
            rv.OnEndOfStream += new AudioStreamImpl.dlgtFinished(OnEndOfStream);
            return(rv as ZelloPTTLib.IAudioStream);
        }