Parameters for RenderDocument

"Pit M." <[email protected]> Sun, 5 Jun 2011 23:31:28 -0700 (PDT)
Newsgroups gmane.comp.mozilla.devel.embedding
Organization http://groups.google.com
Message-ID <ba90e2a8-547a-423a-85c9-aa66685364bc@k17g2000vbn.googlegroups.com>
RenderDocument requires gfxContext, but where can I get this from?
I want to print in my own DC (context) under windows.

Thx