using mshtml;

object x = System.Reflection.Missing.Value;
axWebBrowser1.Navigate(@"你的网页地址", ref x, ref x, ref x, ref x);


private void axWebBrowser1_DocumentComplete(object sender, AxSHDocVw.DWebBrowserEvents2_DocumentCompleteEvent e)
...{
    mshtml.IHTMLDocument2 doc = (mshtml.IHTMLDocument2)axWebBrowser1.Document;
    mshtml.IHTMLWindow2 win = (mshtml.IHTMLWindow2)doc.parentWindow;
    win.execScript("document.body.style.overflow='hidden';","javascript");
}