c++ - 如何获取数据 IWbemClassObject **

Question

你好如何从这个数组中获取数据？或者如何获取我可以提取的所有名称？

hres = pSvc->ExecNotificationQueryAsync( _bstr_t("WQL"), _bstr_t("SELECT * " 
            "FROM __InstanceCreationEvent WITHIN 1 WHERE TargetInstance ISA 'Win32_Process'"), 
        WBEM_FLAG_SEND_STATUS,  NULL, pStubSink);
for (int i = 0; i < lObjectCount; i++)
{
    VARIANT varName;
    hres = apObjArray[i]->Get(_bstr_t(L"__CLASS"),
        0, &varName, 0, 0);

    if (FAILED(hres))
    {
        cout << "Failed to get the data from the query"
            << " Error code = 0x"
            << hex << hres << endl;
        return WBEM_E_FAILED;       // Program has failed.
    }

    printf("Name: %ls\n", V_BSTR(&varName));
}

Answer 1

您的代码无法正常工作，因为 ExecNotificationQueryAsync 的结果必须使用 IWbemObjectSink 处理方法目的。试试这个 MSDN 示例 Receiving Event Notifications Through WMI您也可以使用类似 WMI Delphi Code Creator 的工具生成 C++ 代码以访问 WMI。