I want to add demo of cpanel and hosting controller at my site, from where i can get live demo for these.

You could ask cpanel.. That's all the help I can be. Sorry :(...

About a Cpanel demo

You can create an account like cpanel.yourdomain.com and create a link to it http://username:password@cpanel.yourdomain.com:2082
Be carefull of what do you allow to that account.
I suggest not FTP accounts, CGI and Shell and don't leave enough space to upload anything through the Cpanel File Manager.

About WHM, I suggest to create an non working html version of it.

YOu talking about the smarthosting controler from smarthostingtools.com or the wnidows hosting controller.

Sir,

I need for hostingcontroller for windows hosting.

Thanks