读注册表的默认浏览器路径问题：

 我用下面的代码都注册表里的默认浏览器的路径：是"c:\Program Files\Internet Explorer\iexplore.exe"  -nohome
如何只得到引号里面的那部分啊？我想用shellExecute（）打开，应该怎么处理好啊？
 HKEY                 hkRoot;                                                  
          HKEY                 hSubKey;                                           
          char                 ValueName[256];                                   
          DWORD                 dwType;                                                   
          unsigned         long         cbValueName   =   256;   
          unsigned         long         cbDataValue   =   256;   
          unsigned         char         DataValue[256];                   
    
          if(RegOpenKey(HKEY_CLASSES_ROOT,NULL,&hkRoot)==ERROR_SUCCESS)   
          {   
                  if(RegOpenKeyEx   (hkRoot,"htmlfile\\shell\\open\\command",0,KEY_ALL_ACCESS,&hSubKey)   ==ERROR_SUCCESS)     
                  {   
                          RegEnumValue(hSubKey,0,ValueName,&cbValueName,NULL,&dwType,DataValue,&cbDataValue);   
                  }   
          }   
            
          RegCloseKey(hSubKey);   
          RegCloseKey(hkRoot);   
    
          cout<<DataValue<<endl;