public object CreateControl( 
   Guid controlType
)

using System;
using System.Collections.Generic;
using System.Text;
using Attachmate.Reflection.Framework;
using Attachmate.Reflection.Emulation.IbmHosts;
using Attachmate.Reflection.UserInterface;

namespace CreateASession
{

    class Program
    {
        static void Main(string[] args)
        {
            //Start a visible instance of Reflection or get the instance running at the given channel name
            Application app = MyReflection.CreateApplication("myWorkspace", true);

            //Create a terminal for an Ibm 3270 session
            IIbmTerminal terminal = (IIbmTerminal)app.CreateControl(new Guid("{09E5A1B4-0BA6-4546-A27D-FE4762B7ACE1}"));

            //Specify the host name or IP address
            terminal.HostAddress = "demo:ibm3270.sim";


            //To create a 5250 terminal, use the following lines to get a terminal and specify the host name
            //IIbmTerminal terminal = (IIbmTerminal)app.CreateControl(new Guid("{AF03A446-F278-4624-B9EF-C896DF2CA1CA}"));
            //terminal.HostAddress = "demo:ibm5250.sim";

            //Specify the port number and connect
            terminal.Port = 623;
            terminal.Connect();

            //Create a View to make the session visible                
            IFrame frame = (IFrame)app.GetObject("Frame");
            frame.CreateView(terminal);
        }
    }
}