using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.IO; // No olvidar estos using.//http://social.msdn.microsoft.com/Forums/es-ES/vcses/thread/86149304-c26f-4dcf-b003-198a8879decfnamespace RS232_a{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button_Abrir_Click(object sender, EventArgs e) { if (openFileDialog1.ShowDialog() == DialogResult.OK) { textBox1.Text = openFileDialog1.FileName; } } private void button_Enviar_Click(object sender, EventArgs e) { serialPort1.Open(); byte[] mBuffer = Encoding.ASCII.GetBytes(textBox1.Text.ToString()); serialPort1.Write(mBuffer, 0, mBuffer.Length); serialPort1.Close(); } }}