From: Marcus Sundberg <e94_msu@elixir.e.kth.se>
  To  : ggi-develop@eskimo.com
  Date: Wed, 19 Aug 1998 03:42:03 +0200

Re: 3d

>         I have to admit at this point that I am a bit unclear on the
> difference between a LibGGI-family library (like LibGGI2D or LibGWT) and a
> LibGGI extension library.

There is none!
libggi2d and libgwt both are both libggi extension libraries.

An extension is something that uses the extension mechanism
of libggi (ggiExtension* family functions), and it'll probably
also include ggi/internal/internal.h instead of ggi/ggi.h

//Marcus