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.Runtime.InteropServices;

namespace Display_hexadecimal_LPT_01
{
    public partial class Form1 : Form
    {
        class ControlPort
        {
            [DllImport("inpout32.dll", EntryPoint = "Out32")]
            public static extern void Output(int adress, int value);

[DllImport("inpout32.dll", EntryPoint = "Inp32")]
            public static extern char Input(int adress);
        }

public Form1()
        {
            InitializeComponent();
        }

byte cnt = 0;
        byte[] segmentos =  { 63,6,91,79,102,109,125,7,127,111,119,124,57,94,121,113 };
        string[] monitor =  { "0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F" };

private void btnMas_Click(object sender, EventArgs e)
        {
            if (cnt < 15)
                cnt++;
            lblDisplay.Text = monitor[cnt];
            ControlPort.Output(0x378, segmentos[cnt]);
        }

private void btnMenos_Click(object sender, EventArgs e)
        {
            if (cnt > 0)
                cnt--;
            lblDisplay.Text = monitor[cnt];
            ControlPort.Output(0x378, segmentos[cnt]);
        }

private void Form1_Load(object sender, EventArgs e)
        {
            ControlPort.Output(0x378, segmentos[cnt]);
        }
    }
}

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