From Forum Nokia Wiki

Supports the opening and manipulation of a stream in a dictionary store.

The dictionary store in which the stream is located and the UID associated with that stream are specified when the RDictionaryReadStream is opened.

TUid theuid;
CDictionaryStore* store;
...
RDictionaryReadStream instream;
instream.OpenLC(*store,theuid);
TSomeData data;
instream >> data;
CleanupStack::PopAndDestroy();