PDH获取指定网卡速度

#include <windows.h>
#include <stdio.h>
#include <conio.h>
#include <pdh.h>
#include <pdhmsg.h>
  
  #pragma comment(lib, "pdh.lib")
  
  CONST ULONG SAMPLE_INTERVAL_MS    = 1000;
  CONST PWSTR BROWSE_DIALOG_CAPTION = L"Select a counter to monitor.";
  
  void wmain(void)
  {
      PDH_STATUS Status;
      HQUERY Query = NULL;
      HCOUNTER Counter;
      PDH_FMT_COUNTERVALUE DisplayValue;
      DWORD CounterType;
      SYSTEMTIME SampleTime;
      PDH_BROWSE_DLG_CONFIG BrowseDlgData;//----Intel[R] Centrino[R] Wireless-N 100-----
      WCHAR CounterPathBuffer[PDH_MAX_COUNTER_PATH]=
		  L"\\Network Interface(Intel[R] Centrino[R] Wireless-N 100)\\Bytes Received/sec";
  
      //
      // Create a query.
      //
  
      Status = PdhOpenQuery(NULL, NULL, &Query);
      if (Status != ERROR_SUCCESS) 
      {
         wprintf(L"\nPdhOpenQuery failed with status 0x%x.", Status);
         goto Cleanup;
      }
  
      //
      // Add the selected counter to the query.
      //
  
      Status = PdhAddCounter(Query, CounterPathBuffer, 0, &Counter);
      if (Status != ERROR_SUCCESS) 
      {
          wprintf(L"\nPdhAddCounter failed with status 0x%x.", Status);
          goto Cleanup;
      }
  
      //
      // Most counters require two sample values to display a formatted value.
      // PDH stores the current sample value and the previously collected
      // sample value. This call retrieves the first value that will be used
      // by PdhGetFormattedCounterValue in the first iteration of the loop
      // Note that this value is lost if the counter does not require two
      // values to compute a displayable value.
      //
  
      Status = PdhCollectQueryData(Query);
      if (Status != ERROR_SUCCESS) 
      {
          wprintf(L"\nPdhCollectQueryData failed with 0x%x.\n", Status);
          goto Cleanup;
      }
  
      //
      // Print counter values until a key is pressed.
      //
  
      while (!_kbhit()) 
      {
          Sleep(SAMPLE_INTERVAL_MS);
  
          GetLocalTime(&SampleTime);
  
          Status = PdhCollectQueryData(Query);
          if (Status != ERROR_SUCCESS) 
          {
              wprintf(L"\nPdhCollectQueryData failed with status 0x%x.", Status);
          }
  
          wprintf(L"\n\" %2.2d:%2.2d:%2.2\"",
                  SampleTime.wHour,
                  SampleTime.wMinute,
                  SampleTime.wSecond);
  
          //
          // Compute a displayable value for the counter.
          //
  
          Status = PdhGetFormattedCounterValue(Counter,
                                               PDH_FMT_DOUBLE,
                                               &CounterType,
                                               &DisplayValue);
          if (Status != ERROR_SUCCESS) 
          {
              wprintf(L"\nPdhGetFormattedCounterValue failed with status 0x%x.", Status);
              goto Cleanup;
          }
		WCHAR STR[200];
          wsprintf(STR,L"%.20g\/s", DisplayValue.doubleValue);
      }
  
  Cleanup:
  
      //
      // Close the query.
      //
  
      if (Query) 
      {
         PdhCloseQuery(Query);
      }
  }