Bonobo and printing

Hi,

I would like to add some printing capablility to some Bonobo components.
In Bonobo_Print.idl, I read the following comment about the render
method:

"This return a gnome-print Meta Stream"

I could not find out what is a gnome-print Meat Stream and how to create
one. Why not use a GnomePrintContext?

Some help would be gratefully welcomed.

Best regards,

Jean Bréfort