[vtkusers] How save a single view as picture?

[=?gb2312?q?=FFffffc3=FFffffcf=FFffffe7=FFffffe2=20=FFffffd0=FFffffbb?=]

Hi
   By vtkWindowToImageFilter and vtkJPEWriter I can
save whole render window as a picture.But I want to
save a single view as a picture, when several views in
one render window.What should I do?
Thanks
echo

_________________________________________________________
Do You Yahoo!? 
完全免费的雅虎电邮，马上注册获赠额外60兆网络存储空间
http://cn.rd.yahoo.com/mail_cn/tag/?http://cn.mail.yahoo.com