web link manipulation useing web control

OK so i will try again to explain





the full url or request is

Code:

w w w dot yonewmail dot com?hellocarl

but the ?hellocarl part is diffrent each time i need to be able to set this field with a text box entry

Code:

webBrowser1.Navigate(w w w dot yonewmail dot com,+ textbox1.text"_self", null, "Mozilla/5.0 (");

can someone help me please