Is it possible to find out what code the page is sending to the web?

Such as you click on a hyperlink and it sends a request to say www.vbvorums.com

How I have a form that I'm trying to figure out the php code it's using to submit to the web request. Like I enter my username in a field and click the submit button. but don't know what code it is sending.

I want to be able to send the request directly such as

"www.pagename.com/login.php?method=post&Username=User123"

That way I can just enter that as the url and it automatically logs me in.

what function in the webbrowser control do I update?

I need to stop the code before it sends the request and be able to see what the request is that is being sent.

Thanks so much for all your help.

Mythos