Supports the creation or replacement of a stream a dictionary store.
To prepare a stream for writing, use the RDictionaryWriteStream::AssignL() or RDictionaryWriteStream::AssignLC() functions, passing a reference to the dictionary store and the UID associated with the stream.
If no stream is associated with the UID, then a new stream is created. An association is made between the resulting stream ID and the UID.
If a stream is currently associated with the specified UID, then the existing stream is prepared for replacement.
outstream << data;
CleanupStack::PopAndDestroy(); // cleanup the write stream
store->CommitL(); // commit changes to the dictionary store