注册表查询取值！！！

 1 char* read_reg_sz()//读取操作表,其类型为REG_SZ
 2 {
 3     HKEY hkey;
 4     LPCTSTR data_set = _T("\Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Shell Folders");  //\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders" /v "Favorites"‘
 5 
 6         if (ERROR_SUCCESS == ::RegOpenKeyEx(HKEY_CURRENT_USER, data_set, 0, KEY_READ, &hkey))
 7         {
 8             TCHAR dwValue[256];
 9             DWORD dwSzType = REG_SZ;
10             DWORD dwSize = sizeof(dwValue);
11             _tsetlocale(LC_ALL, _T("chs")); 
12             if (::RegQueryValueEx(hkey, _T("Favorites"), 0, &dwSzType, (LPBYTE)&dwValue, &dwSize) != ERROR_SUCCESS)
13             {
14                 cout << "无法查询有关的注册表信息" << endl;
15             }
16             char* reValue;
17             reValue = UnicodeToAnsi(dwValue);
18             ::RegCloseKey(hkey);
19             return reValue;
20         }
21         ::RegCloseKey(hkey);
22 }