data type

Hello.

I know that I can convert samples of a DataType to a DynamicData with rti::core::xtypes::convert function.
Also I know that it's possible to convert that DynamicData to the DataType vice versa.

The question is that is it possible to convert DynamicData that created from a mutable DataType, to a DynamicData of another mutable DataType?
Is converting between datas of mutable DataTypes is possible just by sending data by DataWriter of TypeA and receiving data by DataReader of TypeB OR converting is also possible in code?

Historically we have been passing enumerations as longs. We just switched over from another DDS library, and we want to start passing enums.

However, we are concerned about the bandwidth. How many bytes is an enumeration? Is there any overhead associated with an enum that would make it more cumbersome than a simple long?

Thanks!

First, I use RTI monitor to show this is the datatype of the subscriber (not LabVIEW) that I need to talk to: 

enum IDL::Common::Message_type {
@default_literal
status_issued = 0,
command_issued = 1,
command_success = 2,
command_failure = 3,
command_pending = 4
};
//@Extensibility EXTENSIBLE_EXTENSIBILITY