win32 注册表操作

创建键 RegCreateKeyEx

int SetRecordVideoSavedDays(int newSavedDays)
   {
       HKEY hSubKey = NULL;
       LONG lRet    = ;
       DWORD dwType = ;
       int iRet     = ;

       do
       {
          if (newSavedDays < )
          {
              printf("error: input negative number\n");
              break;
          }
          lRet = RegCreateKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\Cloudsoar 3C\\ServerInfo",
                                  , NULL, REG_OPTION_NON_VOLATILE,
                                  KEY_ALL_ACCESS, NULL, &hSubKey, NULL);
          if (ERROR_SUCCESS != lRet)
          {
              printf("Create Reg failed\n");
              break;
          }

          lRet = RegSetValueEx(hSubKey, "VideoSavedDays", , REG_DWORD, (BYTE*)&newSavedDays, sizeof(newSavedDays));
          if (ERROR_SUCCESS != lRet)
          {
              printf("Set reg value VideoSavedDays failed\n");
              break;
          }

          iRet = (int)newSavedDays;
      } while ();

      if(NULL != hSubKey)
      {
          RegCloseKey(hSubKey);
          hSubKey = NULL;
      }

      return iRet;
  }

  // parameter1: out, save video saved path
  // parameter2: in, save path length
  BOOL GetRecordVideoSavedPath(char *pchPath,int pathBufLen)
  {
      HKEY hSubKey    = NULL;
      LONG lRet       = ;
      DWORD dwType    = ;
      DWORD dwPathLen = pathBufLen;
      BOOL bRet       = FALSE;

      do
      {
          lRet = RegOpenKeyEx(HKEY_LOCAL_MACHINE,
                              "SOFTWARE\\Cloudsoar 3C\\ServerInfo",
                              , KEY_READ, &hSubKey);
          if (ERROR_SUCCESS != lRet)
          {
              printf("Open reg value VideoSavedPath failed\n");
              break;
          }

          lRet = RegQueryValueEx(hSubKey, "VideoSavedPath",
                                  , &dwType, (LPBYTE)pchPath, &dwPathLen);
          if (ERROR_SUCCESS != lRet)
          {
              printf("Query reg value VideoSavedPath failed\n");
              break;
          }

          bRet = TRUE;

      } while ();

      RegCloseKey(hSubKey);

      return bRet;
  }

  BOOL SetRecordVideoSavePath(char *pchNewPath)
  {
      HKEY hSubKey  = NULL;
      LONG lRet     = ;
      DWORD dwType  = ;
      DWORD dwState = ;
      BOOL bRet     = FALSE;

      do
      {
          if (NULL == pchNewPath)
          {
              printf("error: input negative new path\n");
              break;
          }
          lRet = RegCreateKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\Cloudsoar 3C\\ServerInfo",
              , NULL, REG_OPTION_NON_VOLATILE,
              KEY_ALL_ACCESS, NULL, &hSubKey, &dwState);
         if (ERROR_SUCCESS != lRet)
         {
             printf("Create Reg VideoSavedPath failed\n");
             break;
         }

         lRet = RegSetValueEx(hSubKey, "VideoSavedPath", , REG_SZ, (PBYTE)pchNewPath, sizeof(pchNewPath));
         if (ERROR_SUCCESS != lRet)
         {
             printf("Set reg value VideoSavedPath failed\n");
             break;
         }

         bRet = TRUE;
     } while ();

     RegCloseKey(hSubKey);

     return bRet;
 }

函数原型

  LONG RegCreateKeyEx(
  HKEY hKey, // handle to open key
  LPCTSTR lpSubKey, // subkey name
  DWORD Reserved, // reserved
  LPTSTR lpClass, // class string
  DWORD dwOptions, // special options
  REGSAM samDesired, // desired security access
  LPSECURITY_ATTRIBUTES lpSecurityAttributes, // inheritance
  PHKEY phkResult, // key handle
 LPDWORD lpdwDisposition // disposition value buffer
 );

参数说明

 hKey: 　　要打开键的句柄或以下预定义句柄
  HKEY_CLASSES_ROOT
  HKEY_CURRENT_USER
  HKEY_LOCAL_MACHINE
  HKEY_USERS
  lpSubKey: 　　指向一个用于定义子键路径的字符串
  Reserved,dwOptions,samDesired: 　　置0
  lpClass,lpSecurityAttributes: 　　置NULL
  phkResult: 　　用于接收键句柄
 lpdwDisposition: 　　接收的相关信息,取值如下
 REG_CREATED_NEW_KEY 　　创建成功
 REG_OPENED_EXISTING_KEY 　　 键已存在

打开键 RegOpenKeyEx
函数原型

 LONG RegOpenKeyEx(
     HKEY hKey, // handle to open key
     LPCTSTR lpSubKey, // subkey name
     DWORD ulOptions, // reserved
     REGSAM samDesired, // security access mask
     PHKEY phkResult // handle to open key
 );

参数说明

 hKey: 　 　　要打开键的句柄或以下预定义句柄
 HKEY_CLASSES_ROOT
 HKEY_CURRENT_USER
 HKEY_LOCAL_MACHINE
 HKEY_USERS
 lpSubKey: 　　指向一个用于定义子键路径的字符串
 ulOptions: 　　保留位,置0
 samDesired: 　　打开键后键的操作权限
 phResult: 　　接收打开的键的句柄

修改/添加键值 RegSetValueEx
函数原型

 LONG RegSetValueEx(
     HKEY hKey, // handle to key
     LPCTSTR lpValueName, // value name
     DWORD Reserved, // reserved
     DWORD dwType, // value type
     CONST BYTE *lpData, // value data
     DWORD cbData // size of value data
 );

参数说明

 hKey: 　　打开键的句柄或以下预定义句柄
  HKEY_CLASSES_ROOT
  HKEY_CURRENT_USER
  HKEY_LOCAL_MACHINE
  HKEY_USERS
  lpValueName: 　　键值的名称
  Reserved: 　　保留位,置0
  dwType: 　　键值的类型
  lpData: 　　键值
 cbData: 　　键值数据长度