filling in web text box (automation)

I would like to know if there is a way to fill in a text box on a web page. Is there a way to do this in vb by referencing its name?

Thank you.

Sure is.

Post the web page "Source" and identify the TextBox name.

I'm not sure if you know what I mean. I would like the syntax for doing this in visual basic if possible.

Say the <INPUT NAME="Username"... >
How would I code an application that would go to that text box for me, and then type in any text that I previously specified?

I've tried doing it by using a browser inside of a form, but I was unable to find out how to do what I planned on.

Thanks to everyone.