I'm thinking of writing a program that would be able to interface with a web
browser such as Internet Explorer on a PC. What I'm trying to do is basic
browser operations such as:

a) navigating through URLs
b) reading in the page and make some decisions off of it
c) enter information in to and submit forms

Any ideas on where to begin, such as a third party API that's designed to do
this stuff, or just some tips on what I need to do to write my own, would be
greatly appreciated.