I\'m trying to create an ajax call to a custom controller.
I\'ve been following: http://www.atwix.com/magento/ajax-requests-in-magento/ - which gives a brief example of
You need to create file sidebar.xml into your template layout directory. that will point to your controller. I can not share whole file structure here. But can share a like from where you can download/create custom module.
http://www.webspeaks.in/2010/08/create-your-first-adminbackend-module.html
Hope it will help you!