C#

int x = 283; // X coordinate of the click
int y = 342; // Y coordinate of the click

IntPtr handle = two.Handle;
StringBuilder className = new StringBuilder(100);

while (className.ToString() != "Internet Explorer_Server") // The class control for the browser
{
    handle = GetWindow(handle, 5); // Get a handle to the child window
    GetClassName(handle, className, className.Capacity);
}

IntPtr lParam = (IntPtr)((y << 16) | x); // The coordinates

IntPtr wParam = IntPtr.Zero; // Additional parameters for the click (e.g. Ctrl)
const uint downCode = 0x201; // Left click down code
const uint upCode = 0x202; // Left click up code
SendMessage(handle, downCode, wParam, lParam); // Mouse button down
SendMessage(handle, upCode, wParam, lParam); // Mouse button up

for (int i = 0; i < textfieldNo; i++)
        {
             
            TextBox tb = new TextBox();
            tb.ID = "txtChoice" + s;        
            Form.Controls.Add(tb);
            s++;
        }

;
Socket socket;
IPEndPoint hostEndPoint;
string packet;
 
public void run()
{
  TCPConnect();

  packet = SendReceive("/signin.aspx", "GET");
  if (GetReturnCode(packet) == "400")
    TCPReset();

  packet = SendReceive("/index.html", "GET");

  TCPClose();  
}
 
private void TCPConnect()
{
  // Make sure there is a connection
  if (socket == null)
  {
    socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
    hostEndPoint = new IPEndPoint(ipaddr, port);
  }

  socket.Connect(hostEndPoint);
}
 
// My problem is getting this function working properly
private void TCPReset()
{
  socket.Disconnect(true); // Close the socket connection and allow reuse of the socket
  socket.Connect(hostEndPoint); // This is ignored according to Ethereal,
                                // nothing is sent even using socket.Send()
}
 
private void TCPClose()
{
  socket.Shutdown(SocketShutdown.Both);
  socket.Close();
}
 
private string SendReceive(string strURI, strMethod)
{
  string pcAppend = " HTTP/1.1\r\nConnection: Keep-Alive\r\n\Content-Length: 0\r\n" +
      "User-Agent: Mozilla/4.0 (Compatible; MSIE 7.0; Windows NT 5.2; .NET CLR " +
      "2.0.50727; .NET CLR 3.0.04506.30; InfoPath.1; .NET CLR 3.5.21022)\r\n" +
      "Content-Type: application/x-www-form-urlencoded\r\nHost: " + strIPAddress + "\r\n\r\n";
  byte[] pcSend = System.Text.ASCIIEncoding.ASCII.GetBytes(strMethod + strURI + pcAppend);
  byte[] bfBuffer = new byte[10240];

  socket.Send(pcSend, pcSend.Length, 0);
  socket.Receive(bfBuffer, bfBuffer.Length, SocketFlags.None);

  return System.Text.ASCIIEncoding.ASCII.GetString(bfBuffer);
}