How to expand Internet Explorer sharing on Windows Phone 8?

I'm stuck trying to figure out how to include a simple link exchange from IE into my application. I am trying to figure out how to extend the partition collector for Internet Explorer.
For example, when starting IE on WP8, you can open the menu at the bottom and click on "Share Page". In this menu, I would like to add my application as an option. Once selected, I would like it to send the current page URL to my application.

I found this one , but this example extends only the photo selection application.