Availability: S60.
The inbox module offers APIs to device inbox, outbox, sent and drafts folders. Currently, the inbox module supports only SMS handling and notifications of incoming messages to the device inbox.
| [folder_type]) | 
The optional parameter folder_type defines the type of the folder to 
which the created Inbox object has access to. The default is the device's 
inbox folder, inbox.EInbox.
The following data items are available in the inbox module to define 
the type of the folder for Inbox objects: