Send a notification when a custom folder changes

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Import the net.rim.blackberry.api.messagelist.ApplicationMessageFolder class.
To notify a BlackBerry® device application when a message is added to a custom folder, invoke ApplicationMessageFolder.fireElementAdded().
```
inboxFolder.fireElementAdded( newMessage );
```
To notify a BlackBerry device application when a message is removed from a custom folder, invoke ApplicationMessageFolder.fireElementRemoved().
```
inboxFolder.fireElementRemoved( deletedMessage );
```
To notify a BlackBerry device application when a message in a custom folder is updated, invoke ApplicationMessageFolder.fireElementUpdated().
```
inboxFolder.fireElementUpdated( updatedMessage );
```
To notify a BlackBerry device application when more than one message in a custom folder changes, invoke ApplicationMessageFolder.fireReset().
```
inboxFolder.fireReset();
```

Parent topic: Using custom messages and folders in the message list