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RegEnumValue

Posted on 1998-05-06
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Last Modified: 2013-11-20
I just want to know the parameters declarations for the RegEnumValue function to be able to retreive values in a key. Which parameters I really need?
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Question by:fmichaud061597
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by:fmichaud061597
ID: 1308110
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mikeblas earned 50 total points
ID: 1308111
You need all of them, except for the "reserved" parameter.

Here's a sample:

// -- begin file enum.cpp --

// compile me with
//      cl enum.cpp


#include <windows.h>
#include <stdio.h>

#pragma comment(lib, "advapi32.lib")

void main()
{
   HKEY hKey;

   if (ERROR_SUCCESS == RegOpenKeyEx(HKEY_LOCAL_MACHINE,
      "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Extensions",
      0, KEY_READ, &hKey))
   {
      printf("It worked\n");

      DWORD dwIndex = 0;
      LONG lResult;

      while (1)
      {
         char szValue[1024];
         DWORD dwValueLen = sizeof(szValue) / sizeof(szValue[0]);
         BYTE bData[1024];
         DWORD dwDataLen = sizeof(bData) / sizeof(bData[0]);
         DWORD dwType;

         lResult = RegEnumValue(hKey, dwIndex, szValue, &dwValueLen,
            0, &dwType, bData, &dwDataLen);
         
         if (lResult == ERROR_SUCCESS)
         {
            printf("value name is \"%s\", ", szValue);

            if (dwType == REG_SZ)
               printf("Data is \"%s\"\n", bData);
            else if (dwType == REG_DWORD)
               printf("Data is 0x%8.8X\n", *((DWORD*) &bData));
            else
               printf("This program only supports DWORD and SZ\n");

            dwIndex++;
         }
         else
            break;
      }

      RegCloseKey(hKey);
   }

   return;
}

// -- end file enum.cpp --


.B ekiM
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