Controlling a Real Measurement "3153 Hioki Hipot" Device by Using Serial and Parallel Ports in C#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Text;
using System.Runtime.InteropServices;
using System.Threading;
using System.Windows.Forms;

namespace ParallelPort
{      
    public partial class HipotParPort : Form
    {
        public static int nAddress = 888;  //Default is LPT1. If you want to use LPT2 choose 632
        public static Int32 onValue = 1; //decimal 1 -> only D0 is high.
        public static Int32 offValue = 0; //decimal 0 -> all data pins of the ParallelPort is low.
        public static int nDelay = 1000; // put some time between ON/OFF states in case of burning...                                                                

        public class PortAccess 
        {
            //http://logix4u.net/Legacy_Ports/Parallel_Port/Inpout32.dll_for_Windows_98/2000/NT/XP.html
            //Check the upper url to learn how the inpout32.dll works
            //Note that inpout32.dll must be put to the C:\Windows\System32 folder.
	        [DllImport("inpout32.dll", EntryPoint="Out32")]
	        public static extern void Output(int nAddress, int nDecimalValue);                        
        }  //public class PortAccess

        public static void HipotParPort1(Boolean bBulbOn)
        {            
            Application.DoEvents();

            if (bBulbOn)            
                PortAccess.Output(nAddress, onValue);                            
            else            
                PortAccess.Output(nAddress, offValue);            
            
            Thread.Sleep(nDelay);
        }

        private void InitializeComponent()
        {
            this.SuspendLayout();
            // 
            // HipotParPort
            // 
            this.ClientSize = new System.Drawing.Size(104, 47);
            this.Name = "HipotParPort";
            this.ResumeLayout(false);
        } //public static void HipotParPort1(Boolean bBulbOn)
    }
                                                             
}