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Код

DWORD InitializeTAPI()
{
    HRESULT res = lineSetAppPriority( L"MobileCenter.exe",
                                    LINEMEDIAMODE_INTERACTIVEVOICE,
                                    NULL,
                                    LINEREQUESTMODE_MAKECALL,
                                    NULL, 1 );

    /*
    DWORD dwLineID,
        dwReturn,
        dwTimeCount = GetTickCount(),
        dwAPIVersion;

    LPHLINE lphLine;
    */

    // Initialize the application's use of Tapi.dll. Keep trying until the
    // user cancels or stops getting LINEERR_REINIT.
    while((dwReturn = lineInitialize(
        &g_hLineApp,
        g_hInst,
        (LINECALLBACK)lineCallbackFunc,
        g_tszTitle,
        &g_dwNumDevs)) == LINEERR_REINIT)
    {
        // Bring up the message box if 5 seconds have passed.
        if (GetTickCount() > 5000 + dwTimeCount)
        {
            break;
        }  
    }

    // If function "lineInitialize" fails, then return.
    if (dwReturn)
        return dwReturn;

    // If there is no device, then return.
    if (g_dwNumDevs == 0)
    {
        return LINEERR_NODEVICE;
    }

    if (!(g_lphLine = lphLine = (LPHLINE)LocalAlloc(LPTR, sizeof(HLINE) * g_dwNumDevs)))
    {
        return LINEERR_NOMEM;
    }

    for (dwLineID = 0; dwLineID < g_dwNumDevs; ++dwLineID)
    {  
        //GetLineInfo (dwLineID, &g_lpLineInfo [dwLineID]);
        if (!lineNegotiateAPIVersion(
            g_hLineApp,              // TAPI registration handle
            dwLineID,                // Line device to be queried
            TAPI_VERSION_1_0,        // Least recent API version 
            TAPI_CURRENT_VERSION,    // Most recent API version 
            &dwAPIVersion,             // Negotiated API version 
            NULL))                   // Must be NULL; the provider specific extension is not supported on Windows CE
        {
            dwReturn = lineOpen (
                g_hLineApp,                 // Usage handle for TAPI
                dwLineID,            // Cannot use the LINEMAPPER value
                lphLine,              // Line handle
                dwAPIVersion,        // API version number
                0,                          // Must set to zero for Windows CE
                0,                          // No data passed back 
                LINECALLPRIVILEGE_OWNER ,  
                LINEMEDIAMODE_INTERACTIVEVOICE,                          // Media mode 
                NULL
                );  

            lphLine++;
        }
    }

    return ERR_NONE;
}