How To Emulate a Post Method via a Windows Form

I am writing a meanigless little program to better learn VB.Net and was wondering what one would have to do to submit data to a website via a post method from a WinForm (not a Web Form). A good example might be, say I have a news site I want to submit a story to ( I know the data fields) and for whatever reason I can't use a browser to access it, however I can use this program to submit the data to it like a browser. I am not worried about the output part ( I can do parsing easy enough ). Any Ideas :confused: ? Also No creating a control that just loads the html and emulates the browser is allowed :D . The person would be entering the data through standard text boxes with a local submit button that would format the data and send it to the site.

Ben