c++读取REG_MULTI_SZ类型注册表-白红宇

c++读取REG_MULTI_SZ类型注册表

阅读量：4685 次

发布时间：2019-06-09

本文共 1564 字，大约阅读时间需要 5 分钟。

First: run RegQueryValueEx to get type and necessary memory size:

Single byte code:

1 DWORD type, size; 2 vector
     
       target; 3 if ( RegQueryValueExA( 4     your_key, // HKEY 5     TEXT("ValueName"), 6     NULL, 7     &type, 8     NULL, 9     &size ) != ERROR_SUCCESS )10   return;11 if ( type == REG_MULTI_SZ )12 {13   vector
      
        temp(size);14 15   if ( RegQueryValueExA(16       your_key, // HKEY17       TEXT("ValueName"),18       NULL,19       NULL,20       reinterpret_cast
       
        (&temp[0]),21       &size ) != ERROR_SUCCESS )22   return;23 24   size_t index = 0;25   size_t len = strlen( &temp[0] );26   while ( len > 0 )27   {28     target.push_back(&temp[index]);29     index += len + 1;30     len = strlen( &temp[index] );31   }32 }

Unicode:

1 DWORD type, size; 2 vector
     
       target; 3 if ( RegQueryValueExW( 4     your_key, // HKEY 5     TEXT("ValueName"), 6     NULL, 7     &type, 8     NULL, 9     &size ) != ERROR_SUCCESS )10   return;11 if ( type == REG_MULTI_SZ )12 {13   vector
      
        temp(size/sizeof(wchar_t));14 15   if ( RegQueryValueExW(16       your_key, // HKEY17       TEXT("ValueName"),18       NULL,19       NULL,20       reinterpret_cast
       
        (&temp[0]),21       &size ) != ERROR_SUCCESS )22   return;23 24   size_t index = 0;25   size_t len = wcslen( &temp[0] );26   while ( len > 0 )27   {28     target.push_back(&temp[index]);29     index += len + 1;30     len = wcslen( &temp[index] );31   }32 }