【HELP】RegSetValueEx使用问题，VALUE类型为REG_DWORD

[qq1061006]

////////省略//////////////
DWROD valuedata=1;
DWORD datasize=sizeof(valuedata);
RegSetValueEx(hKey,"dword value",0,REG_DWORD,(CONST BYTE *)valuedata,datasize);


调用RegSetValueEx返回 ERROR_SUCCESS，但是键值并没有设置成功。。 请问问题出在哪里？

[smallfishff]

BYTE valuedata=1;
DWORD datasize=1;

RegSetValueEx(hKey,"dword value",0,REG_DWORD,&valuedata,datasize);

这样试试看.

你要确定有"dword value"这个字段.不过如果返回了ERROR_SUCCESS还没有看到值的话那还比较奇怪.

[龙哥依旧]

具体问题要具体分析

#include <stdafx.h>
#include <windows.h>
#include <iostream>
#include <strsafe.h>

int __cdecl wmain(int argc, LPWSTR *argv)
{
    // Name of the event log.
    wchar_t *logName = L"Application";
    // Event Source name.
    wchar_t *sourceName = L"SampleEventSourceName";
    // DLL that contains the event messages (descriptions).
    wchar_t *dllName = L"C:\\WINDOWS\\SYSTEM32\\eventSource.dll"; 
    // This number of categories for the event source.
    DWORD dwCategoryNum = 1;
   
   HKEY hk; 
   DWORD dwData, dwDisp; 
   TCHAR szBuf[MAX_PATH]; 
   size_t cchSize = MAX_PATH;

   // Create the event source as a subkey of the log. 
   HRESULT hr = StringCchPrintf(szBuf, cchSize, 
      L"SYSTEM\\CurrentControlSet\\Services\\EventLog\\%s\\%s",
      logName, sourceName); 
 
   if (RegCreateKeyEx(HKEY_LOCAL_MACHINE, szBuf, 
          0, NULL, REG_OPTION_NON_VOLATILE,
          KEY_WRITE, NULL, &hk, &dwDisp)) 
   {
      printf("Could not create the registry key."); 
      return 0;
   }
 
   // Set the name of the message file. 
 
   if (RegSetValueEx(hk,             // subkey handle 
          L"EventMessageFile",        // value name 
          0,                         // must be zero 
          REG_EXPAND_SZ,             // value type 
          (LPBYTE) dllName,          // pointer to value data 
          (DWORD) (lstrlen(dllName)+1)*sizeof(TCHAR))) // data size
   {
      printf("Could not set the event message file."); 
      RegCloseKey(hk); 
      return 0;
   }
 
   // Set the supported event types. 
 
   dwData = EVENTLOG_ERROR_TYPE | EVENTLOG_WARNING_TYPE | 
        EVENTLOG_INFORMATION_TYPE; 
 
   if (RegSetValueEx(hk,      // subkey handle 
           L"TypesSupported",  // value name 
           0,                 // must be zero 
           REG_DWORD,         // value type 
           (LPBYTE) &dwData,  // pointer to value data 
           sizeof(DWORD)))    // length of value data 
   {
      printf("Could not set the supported types."); 
      RegCloseKey(hk); 
      return 0;
   }
 
   // Set the category message file and number of categories.

   if (RegSetValueEx(hk,              // subkey handle 
           L"CategoryMessageFile",     // value name 
           0,                         // must be zero 
           REG_EXPAND_SZ,             // value type 
           (LPBYTE) dllName,          // pointer to value data 
           (DWORD) (lstrlen(dllName)+1)*sizeof(TCHAR))) // data size
   {
      printf("Could not set the category message file."); 
      RegCloseKey(hk); 
      return 0;
   }
 
   if (RegSetValueEx(hk,            // subkey handle 
           L"CategoryCount",         // value name 
           0,                       // must be zero 
           REG_DWORD,               // value type 
           (LPBYTE) &dwCategoryNum, // pointer to value data 
           sizeof(DWORD)))          // length of value data 
   {
      printf("Could not set the category count."); 
      RegCloseKey(hk); 
      return 0;
   }

   RegCloseKey(hk); 
   return 1;
}

如果这个可以，对照一下是哪里出的问题