C#用axWebBrowser中提交表单

mshtml.IHTMLDocument2 doc = (mshtml.IHTMLDocument2)axWebBrowser1.Document;
mshtml.IHTMLFormElement f1 =(mshtml.IHTMLFormElement)doc.all.item ("form1",0);
((mshtml.IHTMLFormElement)(f1)).submit();

mshtml.IHTMLElement Element = (mshtml.IHTMLElement)doc.all.item("button1", 0);
Element.click();