es gibt ja unter
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wmisdk/wmi/example_creating_a_wmi_application.asp
ein Beispiel wie man mit den WMI-Klassen umgehen muss.
Allerdings steige ich dort nicht so ganz durch, was genau muss ich dort noch ändern um die Win32_NetworkAdapter http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wmisdk/wmi/win32_networkadapter.asp nutzen zu können? Wie kann ich damit jetzt geziehlt auf die Werte zurgreifen?

Vielen Dank.

-King- schrieb:

// wbemuuid.lib nicht vergessen!
#include <windows.h>
#include <tchar.h>
#include <wbemdisp.h>

VOID ProcessorId(ISWbemObject* pObject)
{
    ISWbemPropertySet* pPropSet = NULL;

    if(SUCCEEDED(pObject->get_Properties_(&pPropSet)))
    {
        ISWbemProperty* pProp = NULL;
        BSTR bstrName = SysAllocString(L"ProcessorId");

        if(SUCCEEDED(pPropSet->Item(bstrName, 0, &pProp)))
        {
            VARIANT varValue;
            VariantInit(&varValue);

            if(SUCCEEDED(pProp->get_Value(&varValue)))
            {
                if(SUCCEEDED(VariantChangeType(&varValue, &varValue, 0, VT_BSTR)))
                {
                    MessageBoxW(NULL, V_BSTR(&varValue), L"ProcessorId", MB_OK);
                }
            }
           
            VariantClear(&varValue);
            pProp->Release();
        }

        SysFreeString(bstrName);
        pPropSet->Release();
    }

    return;
}

int WINAPI _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow)
{
  ISWbemObjectSet* pObjectSet = NULL;
  ISWbemServices*  pServices  = NULL;
  ISWbemObject*    pObject    = NULL;
  IEnumVARIANT*    pEnumObj   = NULL;
  IUnknown*        pUnk       = NULL;
  VARIANT          varItem;
  HRESULT          hr;
  BSTR             bstrClass, bstrName;

    CoInitialize(NULL);

    if(SUCCEEDED(CoGetObject(OLESTR("winmgmts:"), NULL, IID_ISWbemServices, (void**)&pServices)))
    {
        bstrClass = SysAllocString(OLESTR("Win32_Processor"));
                   
        if(SUCCEEDED(pServices->InstancesOf(bstrClass, 0, NULL, &pObjectSet)))
        {
            if(SUCCEEDED(pObjectSet->get__NewEnum(&pUnk)))
            {
                if(SUCCEEDED(pUnk->QueryInterface(IID_IEnumVARIANT, (void**)&pEnumObj)))
                {
                    while(S_OK == pEnumObj->Next(1, &varItem, NULL))
                    {
                        if(FAILED(VariantChangeType(&varItem, &varItem, 0, VT_UNKNOWN)))
                        {
                            VariantClear(&varItem);
                            continue;
                        }

                        pObject = NULL;                        
                        hr = V_UNKNOWN(&varItem)->QueryInterface(IID_ISWbemObject, (void**)&pObject);
                        VariantClear(&varItem);

						ProcessorId(pObject);

                        if(FAILED(hr))
                            continue;

                        bstrName = NULL;
                        pObject->GetObjectText_(0, &bstrName);

                        MessageBoxW(NULL, bstrName, L"Processor Info", MB_OK);

                        SysFreeString(bstrName);
                        pObject->Release();
                    }
                    pEnumObj->Release();
                }
                pUnk->Release();
            }
            pObjectSet->Release();
        }
        SysFreeString(bstrClass);
        pServices->Release();
    }

    CoUninitialize();
    return(0);
}

Wichtig ist auch der Kommentar in der ersten Zeile - WbemUuid.Lib mitlinken (bei mir funktionierte das Ganze aber nur im Release-Modus)