mail::ACCOUNT::saveFolderIndexInfo — Update message status
        
        
        #include <libmail/sync.H>
        
        mail::ACCOUNT *mail;
| bool
            ok=->saveFolderIndexInfo( | size_t messageNum, | 
| const messageInfo
            &msgInfo ); | 
        std::string errmsg=mail->getErrmsg();
mail::ACCOUNT::saveFolderIndexInfo changes
      the status of a message. messageNum must be between zero
      and one less than the return code from mail::ACCOUNT::getFolderIndexSize(3x).
      msgInfo contains the
      new status flags for this message. See mail::ACCOUNT::getFolderIndexInfo(3x)
      for a description of message status flags.
The uid field
        in msgInfo is
        ignored. The message is specified by messageNum, and unique IDs of
        existing messages cannot be changed.