[Evolution-hackers] How to set Character sets of Composer with Bonobo interface

[Joey Shen <joey shen sun com>]

Hi folks,
I'm working on some code very similar to evolution-launch-composer. The 
problem I face now is about character encodings, which, unfortunetly, 
I'm not familar with.
When I pass the string of UTF-8 to the setHeaders() and setBody() 
methods of Composer interface, and then launch
the composer, it dosen't work with CJK characters. Even when I set the 
Body as text/html and compose the body with
<meta content="text/html; charset=utf-8"> seems not to work either. so I 
wonder if the composer set the default charaset
as the locale instead of UTF8 or what else. Could I change the setting 
by bonobo interface? How? Would it work if I pass
the Pango arranged string?
Maybe I'm totally in the wrong direction, if then, PLEASE show me the 
right way to make the UTF8 strings displayed
correctly in composer.
Thanks!
-JoeyS

BTW: I'm working with the evolution 1.2.1 source code, could it be 
better with the later versions?