Всем Привет!

Windows 8.1 / C++

Есть задачка... позвонить на Polycom телефон используя ІР телефонию через протокол Н323.

MicroSoft для таких случаев рекомендует использовать TAPI.
В MSDN нашел несколько примеров, и попробовал реализовать...

    // Initialize COM.
    HRESULT hr = CoInitializeEx(NULL, COINIT_MULTITHREADED);
    // If (hr != S_OK) process the error here.  

    // Create a TAPI entry point object.
    ITTAPI *gpTapi;    // globally allocated 
    hr = CoCreateInstance(
         CLSID_TAPI,
         NULL,
         CLSCTX_INPROC_SERVER,
         IID_ITTAPI,
         (LPVOID *)&gpTapi
         );
    // If (hr != S_OK) process the error here.  

    // Initialize TAPI.
    hr = gpTapi->Initialize();
    // If (hr != S_OK) process the error here. 


/////////////////////////////////////////////

    VARIANT_BOOL bSupport;


    // Declare the interfaces used to select an address.
    IEnumAddress * pIEnumAddress;
    ITAddress * pAddress = NULL;
    ITMediaSupport * pMediaSupport;

    // Use the TAPI object to enumerate available addresses.
    hr = gpTapi->EnumerateAddresses( &pIEnumAddress );
    // If (hr != S_OK) process the error here. 

    // Locate an address that can support the media type the application needs.
    while ( S_OK == pIEnumAddress->Next(1, &pAddress, NULL) )
    {
        // Determine the media support.
        hr = pAddress->QueryInterface(
             IID_ITMediaSupport,
             (void **)&pMediaSupport
             );
        // If (hr != S_OK) process the error here. 

        // In this example, the required media type is already known.
        // The application can also use the address object to
        // enumerate the media supported, then choose from there.
        hr = pMediaSupport->QueryMediaType(
             TAPIMEDIATYPE_AUDIO|TAPIMEDIATYPE_VIDEO,
             &bSupport
             );
        // If (hr != S_OK) process the error here. 

        if (bSupport)
        {
            break;
        }
    }
    // pAddress is now a usable address.

У меня pAddress просто NULL.
Все hr возвращают S_OK.

Подскажите плиз, как быть?
Может я не инициализоровал чего?
Или не настроил?