TCP/IP Chat Application Using C#

��using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using Proshot.CommandClient;

using System.Net;

using System.Runtime.InteropServices;





namespace ChatClient

{

    internal enum FlashMode

    {

        FLASHW_CAPTION = 0x1 ,

        FLASHW_TRAY = 0x2 ,

        FLASHW_ALL = FLASHW_CAPTION | FLASHW_TRAY

    }



    internal struct FlashInfo

    {

        public int cdSize;

        public System.IntPtr hwnd;

        public int dwFlags;

        public int uCount;

        public int dwTimeout;



    }



    public partial class frmPrivate : Form

    {



        private CMDClient remoteClient;

        private IPAddress targetIP;

        private string remoteName;

        private bool activated;

        public string RemoteName

        {

            get { return this.remoteName; }

        }

        protected override bool ProcessCmdKey(ref Message msg , Keys keyData)

        {

            if ( keyData == Keys.Enter )

                this.SendMessage();

            if ( this.txtMessages.Focused && !ShareUtils.IsValidKeyForReadOnlyFields(keyData) )

                return true;

            return base.ProcessCmdKey(ref msg , keyData);

        }

        public frmPrivate(CMDClient cmdClient,IPAddress friendIP,string name,string initialMessage)

        {

            InitializeComponent();

            this.remoteClient = cmdClient;

            this.targetIP = friendIP;

            this.remoteName = name;

            this.Text += " With " + name;

            this.txtMessages.Text = this.remoteName + ": " + initialMessage +Environment.NewLine;

            this.remoteClient.CommandReceived += new CommandReceivedEventHandler(private_CommandReceived);

        }



        public frmPrivate(CMDClient cmdClient , IPAddress friendIP , string name)

        {

            InitializeComponent();

            this.remoteClient = cmdClient;

            this.targetIP = friendIP;

            this.remoteName = name;

            this.Text += " With " + name;

            this.remoteClient.CommandReceived += new CommandReceivedEventHandler(private_CommandReceived);

        }



        private void private_CommandReceived(object sender , CommandEventArgs e)

        {

            switch ( e.Command.CommandType )

            {

                case ( CommandType.Message ):

                    if ( !e.Command.Target.Equals(IPAddress.Broadcast) && e.Command.SenderIP.Equals(this.targetIP))

                    {

                        this.txtMessages.Text += e.Command.SenderName + ": " + e.Command.MetaData + Environment.NewLine;

                        if ( !this.activated)

                        {

                            if(this.WindowState == FormWindowState.Normal || this.WindowState == FormWindowState.Maximized)

                                ShareUtils.PlaySound(ShareUtils.SoundType.NewMessageReceived);

                            else

                                ShareUtils.PlaySound(ShareUtils.SoundType.NewMessageWithPow);

                            this.Flash(this.Handle , FlashMode.FLASHW_ALL , 3);

                        }

                    }

                    break;

            }    

        }



        [DllImport("user32.dll")]

        private static extern int FlashWindowEx(ref FlashInfo pfwi);

        private void Flash(System.IntPtr hwnd , FlashMode flashMode , int times)

        {

            unsafe

            {

                FlashInfo FlashInf = new FlashInfo();

                FlashInf.cdSize = sizeof(FlashInfo);

                FlashInf.dwFlags = (int)flashMode;

                FlashInf.dwTimeout = 0;

                FlashInf.hwnd = hwnd;

                FlashInf.uCount = times;

                FlashWindowEx(ref FlashInf);

            }

        }



        private void btnSend_Click(object sender , EventArgs e)

        {

            this.SendMessage();

        }



        private void SendMessage()

        {

            if ( this.remoteClient.Connected && this.txtNewMessage.Text.Trim() != "")

            {

                this.remoteClient.SendCommand(new Proshot.CommandClient.Command(Proshot.CommandClient.CommandType.Message , this.targetIP , this.txtNewMessage.Text));

                this.txtMessages.Text += this.remoteClient.NetworkName + ": " + this.txtNewMessage.Text.Trim() + Environment.NewLine;

                this.txtNewMessage.Text = "";

                this.txtNewMessage.Focus();

            }

        }



        private void frmPrivate_FormClosing(object sender , FormClosingEventArgs e)

        {

            this.remoteClient.CommandReceived -= new CommandReceivedEventHandler(private_CommandReceived);

        }



        private void mniExit_Click(object sender , EventArgs e)

        {

            this.Close();

        }



        private void mniSave_Click(object sender , EventArgs e)

        {

            SaveFileDialog saveDlg = new SaveFileDialog();

            saveDlg.Filter = "HTML Files(*.HTML;*.HTM)|*.html;*.htm";

            saveDlg.FilterIndex = 0;

            saveDlg.RestoreDirectory = true;

            saveDlg.CheckPathExists = true;

            saveDlg.OverwritePrompt = true;

            saveDlg.FileName = this.Text;

            if ( saveDlg.ShowDialog() == DialogResult.OK )

                ShareUtils.SaveAsHTML(saveDlg.FileName , this.txtMessages.Lines , this.Text);

        }



        private void frmPrivate_Load(object sender , EventArgs e)

        {

            this.Location = new Point(Screen.PrimaryScreen.Bounds.Width - this.Width , Screen.PrimaryScreen.WorkingArea.Height - this.DesktopBounds.Height);

        }



        private void frmPrivate_Activated(object sender , EventArgs e)

        {

            this.activated = true;

        }



        private void frmPrivate_Deactivate(object sender , EventArgs e)

        {

            this.activated = false;

        }



    }

}