枚举windows系统所有设备每个设备包含设备实例ID 硬件ID 设备名称设备类名设备GUID

ta111105 2011-09-21 10:17:47

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ta111105 2011-09-22

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stjay 2011-09-21

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MSDN:How to enumerate hardware devices by using SetupDi calls



   #include <stdio.h>

   #include <windows.h>

   #include <setupapi.h>

   #include <devguid.h>

   #include <regstr.h>



   int main( int argc, char *argv[ ], char *envp[ ] )

   {

       HDEVINFO hDevInfo;

       SP_DEVINFO_DATA DeviceInfoData;

       DWORD i;



       // Create a HDEVINFO with all present devices.

       hDevInfo = SetupDiGetClassDevs(NULL,

           0, // Enumerator

           0,

           DIGCF_PRESENT | DIGCF_ALLCLASSES );

       

       if (hDevInfo == INVALID_HANDLE_VALUE)

       {

           // Insert error handling here.

           return 1;

       }

       

       // Enumerate through all devices in Set.

       

       DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);

       for (i=0;SetupDiEnumDeviceInfo(hDevInfo,i,

           &DeviceInfoData);i++)

       {

           DWORD DataT;

           LPTSTR buffer = NULL;

           DWORD buffersize = 0;

           

           //

           // Call function with null to begin with, 

           // then use the returned buffer size (doubled)

           // to Alloc the buffer. Keep calling until

           // success or an unknown failure.

           //

           //  Double the returned buffersize to correct

           //  for underlying legacy CM functions that 

           //  return an incorrect buffersize value on 

           //  DBCS/MBCS systems.

           // 

           while (!SetupDiGetDeviceRegistryProperty(

               hDevInfo,

               &DeviceInfoData,

               SPDRP_DEVICEDESC,

               &DataT,

               (PBYTE)buffer,

               buffersize,

               &buffersize))

           {

               if (GetLastError() == 

                   ERROR_INSUFFICIENT_BUFFER)

               {

                   // Change the buffer size.

                   if (buffer) LocalFree(buffer);

                   // Double the size to avoid problems on 

                   // W2k MBCS systems per KB 888609. 

                   buffer = LocalAlloc(LPTR,buffersize * 2);

               }

               else

               {

                   // Insert error handling here.

                   break;

               }

           }

           

           printf("Result:[%s]\n",buffer);

           

           if (buffer) LocalFree(buffer);

       }

       

       

       if ( GetLastError()!=NO_ERROR &&

            GetLastError()!=ERROR_NO_MORE_ITEMS )

       {

           // Insert error handling here.

           return 1;

       }

       

       //  Cleanup

       SetupDiDestroyDeviceInfoList(hDevInfo);

       

       return 0;

   }