How to create VPUML Plugin

hi every body,
I am a newbie to VP. I want to know how to create VPUML Plugin, such as GenerateCPlugin.jar in the example showed in help files.
Please tell me step by step, I’m a newbie.
Maybe you can send me an example plugin via my email address ?
Thank you.

Hi
You can see our Open Architecture Documentation in
http://www.visual-paradigm.org/openArchitecture.php

Andy