Automatically click links and save text in web browser VB.NET

I am trying to make a simple application that will validate emails in my yahoo mail account for me. Yahoo mail does not allow POP3 access unless you upgraid to a paid account so I want to create an app in VB.NET that will load yahoo mail in a web browser (insde the application) and then open each one of my emails, search for an activation link, and then click on it automatically. I am not sure how to go about making the application retrieve the text in the browser window, and then click on the link (or load the link in a new browser window, either way).

Does anyone know how to do this?