MBMS Context Tutorial

This tutorial describes how to use the MBMS related context functions in a packet service.

1. 
   Use RPacketMbmsContext::OpenNewContext() to open a new context.
2. 
   To retrieve the active list of MBMS services do the following
   1. 
      create an instance of CRetrievePcktMbmsSessionList
   2. 
      use CRetrievePcktMbmsSessionList::Start() to start the asynchronous retrieval.
   3. 
      use CRetrievePcktMbmsSessionList::RestoreListL() to extract the data from the response of start() function and build the list of services.
   4. 
      use CRetrievePcktMbmsSessionList::Cancel() to cancel the retrieval process.
   5. 
      use CMbmsSession::NewL() to create an object to store the list.
   6. 
      use CMbmsSession::ExternalizeL() to prepare the data to be referenced. use CMbmsSession::InternalizeL() to populate the object with the data from the buffer.
3. 
   useRPacketMbmsContext::UpdateMbmsSessionList() to update the service list.
4. 
   use RTelSubSessionBase::CancelAsyncRequest() to cancel the update function call.