如何在C++中使用WMI类Msvm_SummaryInformation或Msvm_VirtualSystemManagementService查询虚拟机功能

#include <iostream>
#include <comdef.h>
#include <Wbemidl.h>
#pragma comment(lib, "wbemuuid.lib")

using namespace std;
using namespace _com_util;
using namespace WbemServices;

HRESULT hres;
hres = CoInitializeEx(0, COINIT_MULTITHREADED);
if (FAILED(hres))
{
    cout << "Failed to initialize COM library. Error code: " << hex << hres << endl;
    return 1;
}

hres = CoInitializeSecurity(
    NULL,
    -1,
    NULL,
    NULL,
    RPC_C_AUTHN_LEVEL_DEFAULT,
    RPC_C_IMP_LEVEL_IMPERSONATE,
    NULL,
    EOAC_NONE,
    NULL
);
if (FAILED(hres))
{
    cout << "Failed to initialize security. Error code: " << hex << hres << endl;
    CoUninitialize();
    return 1;
}

IWbemLocator* pLoc = NULL;
hres = CoCreateInstance(
    CLSID_WbemLocator,
    0,
    CLSCTX_INPROC_SERVER,
    IID_IWbemLocator,
    (LPVOID*)&pLoc
);
if (FAILED(hres))
{
    cout << "Failed to create IWbemLocator object. Error code: " << hex << hres << endl;
    CoUninitialize();
    return 1;
}

IWbemServices* pSvc = NULL;
hres = pLoc->ConnectServer(
    _bstr_t(L"ROOT\\Virtualization\\V2"),
    NULL,
    NULL,
    0,
    NULL,
    0,
    0,
    &pSvc
);
if (FAILED(hres))
{
    cout << "Could not connect to WMI namespace. Error code: " << hex << hres << endl;
    pLoc->Release();
    CoUninitialize();
    return 1;
}

hres = 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(hres))
{
    cout << "Failed to set proxy blanket. Error code: " << hex << hres << endl;
    pSvc->Release();
    pLoc->Release();
    CoUninitialize();
    return 1;
}

IEnumWbemClassObject* pEnumerator = NULL;
hres = pSvc->ExecQuery(
    bstr_t("WQL"),
    bstr_t("SELECT * FROM Msvm_SummaryInformation"),
    WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,
    NULL,
    &pEnumerator
);
if (FAILED(hres))
{
    cout << "Failed to execute query. Error code: " << hex << hres << endl;
    pSvc->Release();
    pLoc->Release();
    CoUninitialize();
    return 1;
}

IWbemClassObject* pclsObj = NULL;
ULONG uReturn = 0;
while (pEnumerator)
{
    hres = pEnumerator->Next(WBEM_INFINITE, 1, &pclsObj, &uReturn);
    if (uReturn == 0)
    {
        break;
    }

    VARIANT vtProp;
    hres = pclsObj->Get(L"ElementName", 0, &vtProp, 0, 0);
    if (SUCCEEDED(hres))
    {
        wcout << "ElementName: " << vtProp.bstrVal << endl;
        VariantClear(&vtProp);
    }

    pclsObj->Release();
}

pSvc->Release();
pLoc->Release();
pEnumerator->Release();
CoUninitialize();