How to get the Windows Experience Index

 

 

The Windows Experience Index measures the capability of your computer’s hardware and software configuration and expresses this measurement as a number called a base score. A higher base score generally means that your computer will perform better and faster than a computer with a lower base score. How shall we calculate this base score?

 

 

Windows Vista provides WinSAT (Windows System Assessment Tool) APIs to assesses the performance characteristics and capabilities of a computer. IProvideWinSATResultsInfo interface gives information about an assessment.

 

 

void CsliderctrlDlg::OnBnClickedButton2()

{

   HRESULT hr = S_OK;

   IQueryRecentWinSATAssessment* pAssessment;

   IProvideWinSATResultsInfo* pResults = NULL;

   float baseScore = 0.0;

   WINSAT_ASSESSMENT_STATE state;

   CoInitialize(NULL);

   hr = CoCreateInstance(__uuidof(CQueryWinSAT),

      NULL,

      CLSCTX_INPROC_SERVER,

      __uuidof(IQueryRecentWinSATAssessment),

      (void**)&pAssessment);

   if (SUCCEEDED(hr))

   {

      hr = pAssessment->get_Info(&pResults);

      if (SUCCEEDED(hr))

      {

         hr = pResults->get_AssessmentState(&state);

         if (SUCCEEDED(hr))

         {

            switch(state)

            {

            case WINSAT_ASSESSMENT_STATE_UNKNOWN:

               wprintf(L”The state of the assessment is unknown.\n”);

               break;

            case WINSAT_ASSESSMENT_STATE_VALID:

            case WINSAT_ASSESSMENT_STATE_INCOHERENT_WITH_HARDWARE:

               hr = pResults->get_SystemRating(&baseScore);

               if (SUCCEEDED(hr))

               {

                  wprintf(L”The base score for the computer is %.1f\n”, baseScore);

                  if (WINSAT_ASSESSMENT_STATE_INCOHERENT_WITH_HARDWARE == state)

                  {

                     wprintf(L”Note that the hardware configuration of the computer has changed\n”

                        L”since the assessment was run; the score reflects the prior configuration.”);

                  }

               }

               else

               {

                  // Handle error

               }

               break;

            case WINSAT_ASSESSMENT_STATE_NOT_AVAILABLE:

               wprintf(L”A formal assessment has not run on the computer.\n”);

               break;

            case WINSAT_ASSESSMENT_STATE_INVALID:

               wprintf(L”The assessment data is not valid.\n”);

               break;

            default:

               wprintf(L”The assessment state value is not valid.\n”);

            }

         }

         else

         {

            // Handle error

         }

         pResults->Release();

         pResults = NULL;

      }

      else

      {

         // Handle error

      }

      pAssessment->Release();

      pAssessment = NULL;

   }

   else

   {

      // Handle error

   }

}

#include  "Winsatcominterfacei.h"
void CsliderctrlDlg::OnBnClickedButton2()
{
   HRESULT hr = S_OK;
   IQueryRecentWinSATAssessment* pAssessment;
   IProvideWinSATResultsInfo* pResults = NULL;
   float baseScore = 0.0;
   WINSAT_ASSESSMENT_STATE state;

   CoInitialize(NULL);
   hr = CoCreateInstance(__uuidof(CQueryWinSAT),
      NULL,CLSCTX_INPROC_SERVER,
      __uuidof(IQueryRecentWinSATAssessment),
      (void**)&pAssessment);

   if (SUCCEEDED(hr))
   {
      hr = pAssessment->get_Info(&pResults);
      if (SUCCEEDED(hr))
      {
         hr = pResults->get_AssessmentState(&state);
         if (SUCCEEDED(hr))
         {
            switch(state)
            {
            case WINSAT_ASSESSMENT_STATE_UNKNOWN:
               wprintf(L"The state of the assessment is unknown.\n");
               break;

            case WINSAT_ASSESSMENT_STATE_VALID:
            case WINSAT_ASSESSMENT_STATE_INCOHERENT_WITH_HARDWARE:
               hr = pResults->get_SystemRating(&baseScore);
               if (SUCCEEDED(hr))
               {
                  wprintf(L"The base score for the computer is %.1f\n", baseScore);
                  if (WINSAT_ASSESSMENT_STATE_INCOHERENT_WITH_HARDWARE == state)
                  {
                     wprintf(L"Note that the hardware configuration of the computer has changed\n"
                        L"since the assessment was run; the score reflects the prior configuration.");
                  }
               }
               else
               {  // Handle error  }
               break;
             case WINSAT_ASSESSMENT_STATE_NOT_AVAILABLE:
               wprintf(L"A formal assessment has not run on the computer.\n");
               break;
            case WINSAT_ASSESSMENT_STATE_INVALID:
               wprintf(L"The assessment data is not valid.\n");
               break;
            default:
               wprintf(L"The assessment state value is not valid.\n");
            }
        }
         else
         {
            // Handle error
         }
         pResults->Release();
         pResults = NULL;
      }
      else
      {
         // Handle error
      }
      pAssessment->Release();
      pAssessment = NULL;
   }
   else
   {
      // Handle error
   }
}

Courtesy : MSDN

 

 

 

Don’t forget,  its applicable only to Windows Vista and higher versions.