no beforenavigate event in webBrowser1?

[Boki]

HI All,

I want to auto postdata to a server.

However, the original webpage has a "submit" button, when user click
it, it will submit the texts in the form.

However, when I try to do

webBrowser1.Navigate("www.google.com", "",
ASCIIEncoding.ASCII.GetBytes("BOKI TEST"), "Content-Type: application/
x-www-form-urlencoded" + "\n" + "\r");

It can't work.

it seems there is no beforenavigate event in c# ?
Could you please advice ?

Best regards,
Boki.