mail::ACCOUNT::readFolderInfo — Get folder status
        
        
        #include <libmail/sync.H>
        
        mail::ACCOUNT *mail;
| bool
            ok=mail->openFolder( | const mail::folder *folder, | 
| mail::ACCOUNT::FolderInfo
            &info ); | 
        std::string errmsg=mail->getErrmsg();
This function reads the current status of folder, which may refer to any
      folder in the mail account (not necessarily the currently
      open folder).
The following fields in info will be initialized by
      this function:
Total number of messages in the folder.
Total number of unread messages in the folder.
This field should be initialized before calling this
            function. If set to true
            the message counts are returned only if they can be
            computed quickly. Otherwise folderInfoCallback's
            success method will not
            be invoked at all, but callback's success method will still be
            invoked.
If this field is set to false (the default), the message
            counts are returned in all cases.