#define _WIN32_DCOM

#include <iostream>

using namespace std;

#include <comdef.h>

#include <wbemidl.h>

#include <vector>

# pragma comment(lib, "wbemuuid.lib")

string GetBiosSerialNumber()

{

    string result("");

    HRESULT hres;

    // Step 1: --------------------------------------------------

    // Initialize COM. ------------------------------------------

    hres =  CoInitializeEx(, COINIT_MULTITHREADED);

    if (FAILED(hres))

    {

        cout << "Failed to initialize COM library. Error code = 0x"

            << hex << hres << endl;

        return result;                  // Program has failed.

    }

    // Step 2: --------------------------------------------------

    // Set general COM security levels --------------------------

    hres =  CoInitializeSecurity(

        NULL,

        -,                          // COM authentication

        NULL,                        // Authentication services

        NULL,                        // Reserved

        RPC_C_AUTHN_LEVEL_DEFAULT,   // Default authentication

        RPC_C_IMP_LEVEL_IMPERSONATE, // Default Impersonation

        NULL,                        // Authentication info

        EOAC_NONE,                   // Additional capabilities

        NULL                         // Reserved

        );

    if (FAILED(hres))

    {

        cout << "Failed to initialize security. Error code = 0x"

            << hex << hres << endl;

        CoUninitialize();

        return result;                    // Program has failed.

    }

    // Step 3: ---------------------------------------------------

    // Obtain the initial locator to WMI -------------------------

    IWbemLocator *pLoc = NULL;

    hres = CoCreateInstance(

        CLSID_WbemLocator,

        ,

        CLSCTX_INPROC_SERVER,

        IID_IWbemLocator, (LPVOID *) &pLoc);

    if (FAILED(hres))

    {

        cout << "Failed to create IWbemLocator object."

            << " Err code = 0x"

            << hex << hres << endl;

        CoUninitialize();

        return result;                 // Program has failed.

    }

    // Step 4: -----------------------------------------------------

    // Connect to WMI through the IWbemLocator::ConnectServer method

    IWbemServices *pSvc = NULL;

    // Connect to the root\cimv2 namespace with

    // the current user and obtain pointer pSvc

    // to make IWbemServices calls.

    hres = pLoc->ConnectServer(

         _bstr_t(L"ROOT\\CIMV2"), // Object path of WMI namespace

         NULL,                    // User name. NULL = current user

         NULL,                    // User password. NULL = current

         ,                       // Locale. NULL indicates current

         NULL,                    // Security flags.

         ,                       // Authority (for example, Kerberos)

         ,                       // Context object

         &pSvc                    // pointer to IWbemServices proxy

         );

    if (FAILED(hres))

    {

        cout << "Could not connect. Error code = 0x"

             << hex << hres << endl;

        pLoc->Release();

        CoUninitialize();

        return result;                // Program has failed.

    }

    cout << "Connected to ROOT\\CIMV2 WMI namespace" << endl;

    // Step 5: --------------------------------------------------

    // Set security levels on the proxy -------------------------

    hres = CoSetProxyBlanket(

       pSvc,                        // Indicates the proxy to set

       RPC_C_AUTHN_WINNT,           // RPC_C_AUTHN_xxx

       RPC_C_AUTHZ_NONE,            // RPC_C_AUTHZ_xxx

       NULL,                        // Server principal name

       RPC_C_AUTHN_LEVEL_CALL,      // RPC_C_AUTHN_LEVEL_xxx

       RPC_C_IMP_LEVEL_IMPERSONATE, // RPC_C_IMP_LEVEL_xxx

       NULL,                        // client identity

       EOAC_NONE                    // proxy capabilities

    );

    if (FAILED(hres))

    {

        cout << "Could not set proxy blanket. Error code = 0x"

            << hex << hres << endl;

        pSvc->Release();

        pLoc->Release();

        CoUninitialize();

        return result;               // Program has failed.

    }

    // Step 6: --------------------------------------------------

    // Use the IWbemServices pointer to make requests of WMI ----

    // For example, get the name of the operating system

    IEnumWbemClassObject* pEnumerator = NULL;

    hres = pSvc->ExecQuery(

        bstr_t("WQL"),

        bstr_t("SELECT * FROM Win32_BIOS"),

        WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,

        NULL,

        &pEnumerator);

    if (FAILED(hres))

    {

        cout << "Query for operating system name failed."

            << " Error code = 0x"

            << hex << hres << endl;

        pSvc->Release();

        pLoc->Release();

        CoUninitialize();

        return result;               // Program has failed.

    }

    // Step 7: -------------------------------------------------

    // Get the data from the query in step 6 -------------------

    IWbemClassObject *pclsObj = NULL;

    ULONG uReturn = ;

    while (pEnumerator)

    {

        HRESULT hr = pEnumerator->Next(WBEM_INFINITE, ,

            &pclsObj, &uReturn);

        if( == uReturn)

        {

            break;

        }

        VARIANT vtProp;

        // Get the value of the Name property

        hr = pclsObj->Get(L"SerialNumber", , &vtProp, , );

        result = _com_util::ConvertBSTRToString(vtProp.bstrVal);

        //wcout << " SerialNumber : " << vtProp.bstrVal << endl;

        VariantClear(&vtProp);

        pclsObj->Release();

    }

    // Cleanup

    // ========

    pSvc->Release();

    pLoc->Release();

    pEnumerator->Release();

    CoUninitialize();

    return result;

}

int _tmain(int argc, _TCHAR* argv[])

{

    wcout <<"Bios Serial Number:"<<GetBiosSerialNumber().c_str()<< endl;

}