C#

try
			{
				Uri uri = new Uri("http://www.thinkdigit.com/forum/login.php");
				string data = "vb_login_username="+userid"&vb_login_password="+password;
				HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(uri);
				request.Method = WebRequestMethods.Http.Post;
				request.ContentLength = data.Length;
				request.ContentType = "application/x-www-form-urlencoded";
				StreamWriter writer = new StreamWriter(request.GetRequestStream());
				writer.Write(data);
				writer.Close();
				HttpWebResponse response = (HttpWebResponse)request.GetResponse();
				StreamReader reader = new StreamReader(response.GetResponseStream());
				string tmp = reader.ReadToEnd();
				response.Close();
				richTextBox1.AppendText(tmp);			   
			}
			catch (Exception ex)
			{
				textBox3.Text = ex.ToString();
			}

<form name="loginfrm" id="loginfrm" action="login.php?do=login" method="post" onsubmit="md5hash_2(vb_login_password, vb_login_md5password, vb_login_md5password_utf, 0);">

<input type="text" class="bginput" style="font-size: 11px" name="vb_login_username" id="navbar_username" size="10" accesskey="u" tabindex="101" value="User Name" onblur="myUnTip();" onmouseout="myUnTip();" onfocus="if (this.value == 'User Name') this.value = '';myTip();"   />

<input type="password" class="bginput" style="font-size: 11px" name="vb_login_password" id="navbar_password" size="10" tabindex="102" />

<input type="submit" class="button" value="Log in" tabindex="104" title="Enter your username and password in the boxes provided to login, or click the 'register' button to create a profile for yourself." accesskey="s" />

private SHDocVw.InternetExplorer browser;

browser.FileDownload += new DWebBrowserEvents2_FileDownloadEventHandler(browser_FileDownload);

void browser_FileDownload(ref bool Cancel)
        {
            //throw new Exception("The method or operation is not implemented.");
        }