How to check when a user clicks a specific button in a browser control?

I have a win-form that contains a browser and It contains a website designed by a client of mine.

It has an end event that when clicked is supposed to close the browser but this doesn't work with Visual studio browser control.

I am trying to see if there is a way that I can be notified when the user clicks a specific button within the browser. I know what the element is called but i cant figure out how i get notified if its clicked.

Any help will be well received.