Remote control of a webpage

Hi there,

I've just recently started having a go at accessing The Net from an MSVC application. I can seem to view the HTML source for a given webpage, but I can't find a way to send information back the other way. For instance, the front-page of a search engine will include an edit box for you to type in what you are looking for - I would like to be able to fill in this box, then press the search button from 'behind the scenes', using a Windows application.

Cheers,

Jase.