/**
  * @param int $pageNumber
  * @param string $condition
  * @param FolderCollection $folders
  * @param bool $inHeadersOnly
  * @param int $countMessages
  * @return WebMailMessageCollection
  */
 function &SearchMessages($pageNumber, $condition, &$folders, $inHeadersOnly, $countMessages)
 {
     $webMailMessageCollection = null;
     if ($this->DbStorage->Connect()) {
         $webMailMessageCollection =& $this->DbStorage->SearchMessages($pageNumber, $condition, $folders, $inHeadersOnly, $countMessages);
     }
     return $webMailMessageCollection;
 }