Anu,
If you are calling your help from an application that can run
JavaScript or from a website, I think you can do this with
JavaScript. Do a search on the Web for "JavaScript disable
maximize." It looks like the key is to have the attribute
"resizable=no", so you could add that to your search, too. The
JavaScript would have to be put in the link that calls the help
from the application or site, not in RoboHelp or any of the topics.
Hope this helps,
Ben