Windows Mobile Interprocess Communication with Message Queues in .NET

using System;
using System.IO;
using System.Linq;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using J2i.Net.NamedObjects;

namespace J2i.Net.WriterClient
{
    public partial class Form1 : Form
    {
        const string QueueEndpointName = "J2i.Net.ReaderWriterTestQueue";
        const int maxItems = 8;
        const int maxMessageSize = 1024;

        string _helpFilePath ;

        MessageQueueWriter _writer = null;

        string HelpFilePath
        {
            get
            {
                if (_helpFilePath == null)
                {
                    _helpFilePath = Path.Combine(Path.GetDirectoryName(this.GetType().Assembly.GetModules()[0].FullyQualifiedName), "J2i.Net.WriterClient.Htlp.html");
                }
                return _helpFilePath;
            }
        }


        public Form1()
        {
            InitializeComponent();
            _writer = new MessageQueueWriter(QueueEndpointName, maxItems, maxMessageSize);

        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void miExit_Click(object sender, EventArgs e)
        {
            _writer.Dispose();
            this.Close();
        }

        private void cmdSend_Click(object sender, EventArgs e)
        {
            QueueResult result =  _writer.Write(this.txtMessage.Text,2000);
            if (result == QueueResult.OK)
            {
                txtMessage.Text = String.Empty;
                statusBar.Text = "Message Send.";
            }
            else
            {
                statusBar.Text = String.Format("Message not sent:{0}", result);
            }
            UpdateQueueInfo();
            txtMessage.Focus();
        }

        void UpdateQueueInfo()
        {
            MessageQueueInfo mqinfo = _writer.GetMessageQueueInfo();
            this.lvQueueInfo.Items.Clear();

            ListViewItem item;

            item = new ListViewItem(new string[] { "Number of Writers", mqinfo.NumWriters.ToString() });
            lvQueueInfo.Items.Add(item);

            item = new ListViewItem(new string[] { "Number of Readers", mqinfo.NumReaders.ToString() });
            lvQueueInfo.Items.Add(item);

            item = new ListViewItem(new string[] { "Max Message Count", mqinfo.dwMaxQueueMessages.ToString() });
            lvQueueInfo.Items.Add(item);

            item = new ListViewItem(new string[] { "Max Messages", mqinfo.dwMaxMessages.ToString() });
            lvQueueInfo.Items.Add(item);

            item = new ListViewItem(new string[] { "Current Messages", mqinfo.dwCurrentMessages.ToString() });
            lvQueueInfo.Items.Add(item);

        }

        private void miQueueInfo_Click(object sender, EventArgs e)
        {
            UpdateQueueInfo();
        }

        private void Form1_HelpRequested(object sender, HelpEventArgs hlpevent)
        {
            Help.ShowHelp(this, HelpFilePath);
        }
    }
}