mail::folder::hasMessages — Determine if the folder is capable of storing messages
        
        
        #include <libmail/mail.H>
        
        mail::folder *folder;
| bool
            flag=folder->hasMessages( | void); | 
Some folders contain messages. Other folders contain other
      folder (subfolders). Some IMAP servers are capable of
      creating dual-purpose folders that contain both messages and
      other subfolders. The hasMessages method indicates whether
      folder is capable of
      storing messages.
A true result indicates that
      folder is capable of
      storing messages. It may not necessarily mean that folder actually contains any
      messages, it might very well be an empty folder.
POP3 folders return a
        true, even though application
        cannot directly add messages to POP3 folders. Applications should
        interpret a true result to
        mean that:
mail::folder::open(3x) may be used to open this folder.
This folder's mail::folder::addmessage(3x) method, and using this folder as a parameter to mail::folder::copyMessagesTo(3x) will probably work.
Applications should interpret a false result as a guarantee that neither
        of the above procedures will work.