CORBA, or some other distributed OO middlewares in general, are
designed to fill up the semantic gap between high level distributed OO
architecture design and low level transport. Here, distributed OO
design means, your architecture design partitioned an application into
business objects, located at different locations. As a good practice,
architecture designs are usually business oriented, and avoid specific
physical location, communication, platform, programming language,
details. In this case, either you implement your own middle abstract
layer to fill up this high level abstraction to low level transport,
or, you use a third party middleware, like CORBA.

If your application itself is already system or transport oriented,
such as your purpose is simply sending an email or sending some data
through a socket, you certainly don't need such a middle abstraction
layer, or any CORBA like middleware at all.

See other inline comments.

Ke

This is irrelevant. CORBA is not for network routing.

This is irrelevant either. CORBA is not for sharing functions.