在C ++中使用WMI来获取适配器的InterfaceIndex

我已经写了一些代码来初始化COM并通过使用WMI查询Win32_NetworkAdapter类来枚举连接到PC的networking适配器。 我需要使用WMI的原因是我需要枚举的适配器在此时被禁用，但我仍然需要find它的InterfaceIndex，并使用GetInterfaceInfo只检测启用的适配器。 这一切都编译和运行，但在线：

hr = pEnumerator->Next(WBEM_INFINITE, 1, &pClassObj, &ulReturnVal); 

这意味着检索第一个适配器，它不返回任何设备和垃圾HRESULT。 我用这个页面上的例子作为我的指导。

 CoInitialize(NULL); // Initialize COM HRESULT hr = NULL; hr = CoInitializeSecurity( NULL, // security descriptor -1, // use this simple setting NULL, // use this simple setting NULL, // reserved RPC_C_AUTHN_LEVEL_DEFAULT, // authentication level RPC_C_IMP_LEVEL_IMPERSONATE, // impersonation level NULL, // use this simple setting EOAC_NONE, // no special capabilities NULL); // reserved if (FAILED(hr)) { CoUninitialize(); return -1; } IWbemLocator *pLoc = 0; hr = CoCreateInstance(CLSID_WbemLocator, 0, CLSCTX_INPROC_SERVER, IID_IWbemLocator, (LPVOID *) &pLoc); if (FAILED(hr)) { CoUninitialize(); return -1; // Program has failed. } IWbemServices *pSvc = 0; // Connect to the root\default namespace with the current user. hr = pLoc->ConnectServer( _bstr_t(L"ROOT\\CIMV2"), NULL, NULL, 0, NULL, 0, 0, &pSvc); if (FAILED(hr)) { pLoc->Release(); CoUninitialize(); return -1; // Program has failed. } hr = CoSetProxyBlanket(pSvc, RPC_C_AUTHN_WINNT, RPC_C_AUTHZ_NONE, NULL, RPC_C_AUTHN_LEVEL_CALL, RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE); if (FAILED(hr)) { pSvc->Release(); pLoc->Release(); CoUninitialize(); return -1; // Program has failed. } IEnumWbemClassObject* pEnumerator = NULL; hr = pSvc->ExecQuery(bstr_t("WQL"), bstr_t("SELECT * FROM Win32_NetworkAdapter"), WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY, NULL, &pEnumerator); if (FAILED(hr)) { pSvc->Release(); pLoc->Release(); CoUninitialize(); return -1; } IWbemClassObject *pClassObj; ULONG ulReturnVal; while ( pEnumerator ) { hr = pEnumerator->Next(WBEM_INFINITE, 1, &pClassObj, &ulReturnVal); // code would go here to obtain the adapter properties. pClassObj->Release(); } return -1;