Santhosh,
I would expect them to be mostly the same as the synchronous application...check this for more details: http://www.caddigest.com/subjects/pro_engineer/select/tutorials/jovanovic_toolkit_environment.htm
If that doesn't help, you should ask this question in the Toolkit User group instead, because that's probably where this question belongs. So check out http://communities.ptc.com/groups/protoolkit-user, you may have more luck there.
