Calendar entries can be imported and exported in the vCalendar format using CCalDataExchange.
To import a calendar entry, call CCalDataExchange::ImportL(), specifying the data format (currently vCalendar) and the read stream that contains the data.
To export a calendar entry, call CCalDataExchange::ExportL(), specifying the data format (currently vCalendar), the write stream, and an array of entries to export.