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Deleting WMI instance with C++

I have found some samples with C# and VBS for WMI instance deletion, however I need this implemented with C++.

My sample code:

CoInitialize(NULL);

HRESULT hRes;

//Obtain the initial locator to WMI
CComPtr<IWbemLocator> pLoc = NULL;
hRes = CoCreateInstance(CLSID_WbemLocator, NULL, CLSCTX_INPROC_SERVER, IID_IWbemLocator, (LPVOID*) &pLoc);
if(FAILED(hRes))
    return 1;

//Connect to WMI through the IWbemLocator::ConnectServer method
CComPtr<IWbemServices> pSvc = NULL;
//Connect to the root namespace with the current user and obtain pointer pSvc to make IWbemServices calls.
hRes = pLoc->ConnectServer(L"ROOT\\SUBSCRIPTION", NULL, NULL, 0, NULL, 0, 0, &pSvc);
if(FAILED(hRes))
    return 1;

hRes = pSvc->DeleteInstance(
           L"CommandLineEventConsumer.Name='{709782F3-E860-488E-BD8A-89FBC8C1495C}'",
           WBEM_FLAG_RETURN_IMMEDIATELY, NULL, NULL);

return 0;

According to that I've found here and here, my code should work. I surely have CommandLineEventConsumer named {709782F3-E860-488E-BD8A-89FBC8C1495C}

And my code fails on IWbemServices::DeleteInstance, error code 0x80041008 (One of the parameters to the call is not correct).

I would appreciate if someone spot mistake in my code. Or maybe some privileges are required to do that?

Solution

  • I have found two solutions:

    1.Remove WBEM_FLAG_RETURN_IMMEDIATELY flag.

    _bstr_t objPath(L"CommandLineEventConsumer.Name='{709782F3-E860-488E-BD8A-89FBC8C1495C}'");
hRes = pSvc->DeleteInstance(objPath, 0, NULL, NULL);

    2.Pass IWbemCallResult for result.

    _bstr_t objPath(L"CommandLineEventConsumer.Name='{709782F3-E860-488E-BD8A-89FBC8C1495C}'");
CComPtr<IWbemCallResult> pRes = NULL;
hRes = pSvc->DeleteInstance(objPath, WBEM_FLAG_RETURN_IMMEDIATELY, NULL, &pRes);

    Didn't investigate a lot, but it works both ways. Looks like specs aren't 100% correct.