DirectPlay

FillChar(dvDeviceConfig, sizeof(dvSoundDeviceConfig), 0);
  dvDeviceConfig.dwSize := sizeof(DVSOUNDDEVICECONFIG);
    dvDeviceConfig.dwFlags := DVSOUNDCONFIG_AUTOSELECT;
    dvDeviceConfig.guidPlaybackDevice := DSDEVID_DefaultVoicePlayback;

//    dvDeviceConfig.lpdsPlaybackDevice := id ;

    dvDeviceConfig.guidCaptureDevice := DSDEVID_DefaultVoiceCapture;
//    dvDeviceConfig.lpdsCaptureDevice := nil;
    dvDeviceConfig.hwndAppWindow := MainForm.Handle;
    //dvDeviceConfig.lpdsMainBuffer := buf;
    dvDeviceConfig.dwMainBufferFlags := 0;
    dvDeviceConfig.dwMainBufferPriority := 0;


    Fillchar(ClientConfig, sizeof(DVClientConfig), 0);
    ClientConfig.dwFlags := DVCLIENTCONFIG_AUTOVOICEACTIVATED or DVCLIENTCONFIG_AUTORECORDVOLUME;
    ClientConfig.lRecordVolume := DVRECORDVOLUME_LAST;
    ClientConfig.lPlaybackVolume := DVPLAYBACKVOLUME_DEFAULT;
    ClientConfig.dwThreshold := DVTHRESHOLD_UNUSED;
    ClientConfig.dwBufferQuality := DVBUFFERQUALITY_DEFAULT;
    ClientConfig.dwBufferAggressiveness := DVBUFFERAGGRESSIVENESS_DEFAULT;
    ClientConfig.dwNotifyPeriod := 0;



    hr := g_pVoiceClient.Connect(dvDeviceConfig, ClientConfig, DVFLAGS_SYNC );