C++ com 组件的使用

// CommonTest.cpp : This file contains the 'main' function. Program execution begins and ends there.
//
 
#include <iostream>
#include <atlbase.h>
#include "mbnapi.h"
 
int main()
{
    HRESULT hr = CoInitializeEx(NULL, COINIT_MULTITHREADED);
    if (FAILED(hr))
    {
        return -1;
    }
    CComPtr<IMbnInterfaceManager>  mbnInterfaceMgr = NULL;
    hr = CoCreateInstance(CLSID_MbnInterfaceManager,NULL,CLSCTX_ALL,IID_IMbnInterfaceManager,(void**)&mbnInterfaceMgr);
    if (FAILED(hr))
    {
        return -1;
    }
 
    SAFEARRAY* psa = NULL;
    hr = mbnInterfaceMgr->GetInterfaces(&psa);
    if (FAILED(hr))
    {
        CoUninitialize();
        return -1;
    }
    LONG lLower;
    hr = SafeArrayGetLBound(psa, 1, &lLower);
    if (FAILED(hr))
    {
        CoUninitialize();
        return -1;
    }
 
    LONG lUpper;
    hr = SafeArrayGetUBound(psa, 1, &lUpper);
    if (FAILED(hr))
    {
        CoUninitialize();
        return -1;
    }
 
    CComPtr<IMbnInterface>  pInf = NULL;
    for (LONG l = lLower; l <= lUpper; l++)
    {
        hr = SafeArrayGetElement(psa, &l, (void*)(&pInf));
        if (SUCCEEDED(hr))
        {
            CComPtr<IMbnSubscriberInformation> subscriberInf = NULL;
            hr = pInf->GetSubscriberInformation(&subscriberInf);
            if (SUCCEEDED(hr)) {
                WCHAR tszID[256] = { L'\0' };
                hr = subscriberInf->get_SubscriberID((BSTR*)&tszID);
                if (SUCCEEDED(hr)) {
                    std::wcout << L"SubscriberID: " << tszID <<std::endl;
                }
            }
        }
    }
    SafeArrayDestroy(psa);
    CoUninitialize();
    return 0;
}
 
// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu
 
// Tips for Getting Started:
//   1. Use the Solution Explorer window to add/manage files
//   2. Use the Team Explorer window to connect to source control
//   3. Use the Output window to see build output and other messages
//   4. Use the Error List window to view errors
//   5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
//   6. In the future, to open this project again, go to File > Open > Project and select the .sln file