mail::account::updateFolderIndexInfo — Update status of the currently open folder
        
        
        #include <libmail/mail.H>
        
        
        class myCallback : public mail::callback {
        public:
            void success(std::string msg);
            void fail(std::string msg);
        };
        mail::account *account;
| account->updateFolderIndexInfo( | myCallback &callback ); | 
This function requests that the status of the currently open folder be updated. Messages marked as deleted are removed. The application will also be notified about changes to the folder made by any other application that has the same folder opened.
This request invokes methods in the currently opened folder's mail::callback::folder object, as follows:
The mail::account::messageChanged method
            is invoked for all messages which have an updated
            status flag set.
mail::account::messagesRemoved is
            invoked for all messages removed from the folder (those
            that were marked as deleted by this application and
            those that were removed from the folder by any other
            application that has this folder opened).
mail::account::newMessages is invoked
            if any messages were added to this folder. The
            application should use mail::account::getFolderIndexSize(3x),
            and compare it to the previously-known folder size, in
            order to determine how many messages were added to the
            folder (new messages are always added to the end of the
            message list).
The application must wait until callback's success or fail method is invoked. The success method is invoked when this request
      is succesfully processed. The fail method is invoked if this request
      cannot be processed. The application must not destroy
      callback until either
      the success or fail method is invoked.
callback's
        fail method may be invoked
        even after other callback methods were invoked. This
        indicates that the request was partially completed before
        the error was encountered.