[Uml-user] ...create a new language generator?

[HyperSonix]

Hi list,

I'm new on this list:-)

I have a question for you,
Umbrello is very cool application to transport an idea into code.

Umbrello support c++ code generation,
but if I have a new language,  for example SystemC (a C++ library), 
which  it  use intensive "#define" and particular C++ coding style.
the question is: 
What do I do to add a modified version of C++ language or particular MACRO.?

Is it simple?

thanks,
            TorbaX.