Windows Services and webbrowser

Hi,

I'm trying to create a windows service that periodically goes to a website and gets some of the html on the website to compare against previous results. I need to have a webbrowser control in my service in order to get though some webpages, eg. logons) (not for a user to see of course but in order to automatically send things like passwords to particular txtboxes on a webpage). However I cannot add an 'explorer' control to my design view in my service, i guess becuase there is no actual form.

I need to have the explorer control so should I add a windows form to my service and if so will that compromise my service at all. Futhermore being pretty much a beginner and not being able to test a windows service til its running how do I refer to the explorer control on the separate form from my service.vb code?

Any help gratefully appreciated :)