How to create a browser helper object with a clickable icon at the corner of the browser?

All,
I wanted to create a browser helper object that has a clickable
icon at the right corner of the browser (similar to the Google notebook
icon at the right corner of the browser). When the user clicks this
icon, it will open a specified URL in a window. I am new to windows
programming. I did some search and found some examples on the internet
such as the one posted on codeprojects
(http://www.codeproject.com/cs/samples/autosig.asp).

But none of the samples told us how to create an icon at the corner of
the browser. All the samples just told us to implement IObjectWithSite
interface. Anybody has any ideas how to implement a clickable icon in a
browser helper object?

Any tips, documents or samples will be greatly appreciated.

thanks,
Qiang