HtmlAgilityPack c#

[BibhutiAlmighty]

I want to create a windows form application that extracts data from a website. I tried using HtmlAgilityPack but i couldn't understand it .

These are the codes that I have written.

private void button1_Click(object sender, EventArgs e)
        {
            HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
            HtmlWeb hw = new HtmlWeb();
            doc = hw.Load("https://www.google.com.np/?gws_rd=cr,ssl&ei=jC1wVPuqNcGMuAT2p4GQCw");


        }

What should i do after that ? How can i extrach a button's text from a specific website.

Please help......