/**
  * @param WebMailMessage $msg
  * @param Folder $folder
  * @return bool
  */
 function UpdateMessage(&$msg, &$folder)
 {
     $log =& CLog::CreateInstance();
     $path = $this->_createFolderFullPath($folder->FullName);
     $log->WriteLine('Update file ' . $path . '/' . $msg->IdMsg . '.eml');
     return $this->CreateFolder($folder) && $msg->SaveMessage($path . '/' . $msg->IdMsg . '.eml');
 }