// error add code form to forum...
var el = instance.ActiveTab.FindElementByAttribute("body", "fulltag", "body", "text", 0);
el.SetAttribute("innerhtml", form); // create form
el = el.FindChildByName("messageBox");
el.RiseEvent("focus", instance.EmulationLevel); // focus field
Thread.Sleep(2*1000);
instance.SendText("{CTRLDOWN}{ENTER}", 0); // send ctrl+enter