Programacion

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Diagnostics;
using System.Media;
using System.Runtime.InteropServices;

namespace Registro_de_puerta_LPT_01
{
    public partial class Form1 : Form
    {
        class ControlPort
        {
            [DllImport("inpout32.dll", EntryPoint = "Inp32")]
            public static extern char Input(int adress);
        }

public Form1()
        {
            InitializeComponent();
        }

DateTime hora;
        Boolean estado = false;
        SoundPlayer puerta;
        int puerto;

private void Form1_Load(object sender, EventArgs e)
        {
            hora = DateTime.Now;
            lblHora.Text = hora.ToString("HH:mm:ss");
        }

private void timer1_Tick(object sender, EventArgs e)
        {
            hora = DateTime.Now;
            lblHora.Text = hora.ToString("HH:mm:ss");
            puerto = ControlPort.Input(0x379);
            if (estado && (puerto == 62))
            {
                try
                {
                    FileStream fs = new FileStream(
                        "Registros.txt", FileMode.Append, FileAccess.Write, FileShare.Write);
                    StreamWriter sw = new StreamWriter(fs);
                    sw.WriteLine("Puerta cerrada -> " + hora.ToString());
                    sw.Close();
                }
                catch (Exception err)
                {
                    MessageBox.Show("Exception: " + err.Message);
                }
                puerta = new SoundPlayer("cerrada.wav");
                puerta.Play();
                estado = false;
            }
            if (!estado && (puerto == 126))
            {
                try
                {
                    FileStream fs = new FileStream(
                        "Registros.txt", FileMode.Append, FileAccess.Write, FileShare.Write);
                    StreamWriter sw = new StreamWriter(fs);
                    sw.WriteLine("Puerta abierta -> " + hora.ToString());
                    sw.Close();
                }
                catch (Exception err)
                {
                    MessageBox.Show("Exception: " + err.Message);
                }
                puerta = new SoundPlayer("abierta.wav"); 
                puerta.Play();
                estado = true;
            }
        }

private void btnArchivo_Click(object sender, EventArgs e)
        {
            Process.Start("Registros.txt");
        }
    }
}

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