How would I use a string to login in to digg?

i try this

h Code:

WebBrowser1.Navigate ("http://digg.com/login=" & "side-username=" & Text1.Text & "&side-password=" & "51256969" & "&.done=http://digg.com/login")

and this

g Code:

WebBrowser1.Navigate ("http://digg.com/login=" & "side-username=" & Text1.Text & "&side-password=" & "51256969" & "&Go=http://digg.com/login")

can't seem to get can some help me I'm new to using string and would like the understand how they work.