string flashSrc = "e:\t.swf";
StringBuilder sb = new StringBuilder();
sb.Append("<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">");
sb.Append("<HTML><HEAD></HEAD><BODY style="margin:0; padding:0;">");
sb.Append("<embed style="POSITION:absolute;" align="center" src="" + flashSrc + "" width="100%" height="100% " type="application/x-shockwave-flash" wmode="transparent" quality="high"></embed>");
sb.Append("</BODY></HTML>");
webBrowser1.DocumentText = sb.ToString();
webBrowser1.IsWebBrowserContextMenuEnabled = false;