VB.Net Tutorial/Socket Network/Chat

Chat Tool

<source lang="vbnet">Imports System Imports System.Net Imports System.Net.Sockets Imports System.Threading Imports System.Text Imports System.Windows.Forms public class ChatTool

  public Shared Sub Main
       Application.Run(New Form1)
  End Sub

End class Public Class Form1

   Inherits System.Windows.Forms.Form
   Public Sub New()
       MyBase.New()
       InitializeComponent()
   End Sub
   Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
       If disposing Then
           If Not (components Is Nothing) Then
               components.Dispose()
           End If
       End If
       MyBase.Dispose(disposing)
   End Sub
   Private components As System.ruponentModel.IContainer
   Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
   Friend WithEvents Label1 As System.Windows.Forms.Label
   Friend WithEvents Label2 As System.Windows.Forms.Label
   Friend WithEvents TextBox2 As System.Windows.Forms.TextBox
   Friend WithEvents Label3 As System.Windows.Forms.Label
   Friend WithEvents TextBox3 As System.Windows.Forms.TextBox
   Friend WithEvents Button1 As System.Windows.Forms.Button
   <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
       Me.TextBox1 = New System.Windows.Forms.TextBox
       Me.Label1 = New System.Windows.Forms.Label
       Me.Label2 = New System.Windows.Forms.Label
       Me.TextBox2 = New System.Windows.Forms.TextBox
       Me.Label3 = New System.Windows.Forms.Label
       Me.TextBox3 = New System.Windows.Forms.TextBox
       Me.Button1 = New System.Windows.Forms.Button
       Me.SuspendLayout()
       "
       "TextBox1
       "
       Me.TextBox1.Location = New System.Drawing.Point(88, 16)
       Me.TextBox1.Name = "TextBox1"
       Me.TextBox1.Size = New System.Drawing.Size(136, 20)
       Me.TextBox1.TabIndex = 0
       Me.TextBox1.Text = ""
       "
       "Label1
       "
       Me.Label1.Location = New System.Drawing.Point(32, 16)
       Me.Label1.Name = "Label1"
       Me.Label1.Size = New System.Drawing.Size(48, 24)
       Me.Label1.TabIndex = 1
       Me.Label1.Text = "Message"
       "
       "Label2
       "
       Me.Label2.Location = New System.Drawing.Point(0, 64)
       Me.Label2.Name = "Label2"
       Me.Label2.Size = New System.Drawing.Size(80, 24)
       Me.Label2.TabIndex = 2
       Me.Label2.Text = "Target IP"
       "
       "TextBox2
       "
       Me.TextBox2.Location = New System.Drawing.Point(88, 64)
       Me.TextBox2.Name = "TextBox2"
       Me.TextBox2.Size = New System.Drawing.Size(136, 20)
       Me.TextBox2.TabIndex = 3
       Me.TextBox2.Text = ""
       "
       "Label3
       "
       Me.Label3.Location = New System.Drawing.Point(8, 104)
       Me.Label3.Name = "Label3"
       Me.Label3.Size = New System.Drawing.Size(72, 24)
       Me.Label3.TabIndex = 4
       Me.Label3.Text = "Record"
       "
       "TextBox3
       "
       Me.TextBox3.AutoSize = False
       Me.TextBox3.Location = New System.Drawing.Point(80, 104)
       Me.TextBox3.Name = "TextBox3"
       Me.TextBox3.Size = New System.Drawing.Size(184, 136)
       Me.TextBox3.TabIndex = 5
       Me.TextBox3.Text = ""
       "
       "Button1
       "
       Me.Button1.Location = New System.Drawing.Point(232, 16)
       Me.Button1.Name = "Button1"
       Me.Button1.Size = New System.Drawing.Size(56, 24)
       Me.Button1.TabIndex = 6
       Me.Button1.Text = "Send"
       "
       "Form1
       "
       Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
       Me.ClientSize = New System.Drawing.Size(292, 266)
       Me.Controls.Add(Me.Button1)
       Me.Controls.Add(Me.TextBox3)
       Me.Controls.Add(Me.Label3)
       Me.Controls.Add(Me.TextBox2)
       Me.Controls.Add(Me.Label2)
       Me.Controls.Add(Me.Label1)
       Me.Controls.Add(Me.TextBox1)
       Me.ResumeLayout(False)
   End Sub
   Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
       Dim bytes(200) As Byte
       Dim MyIP As IPAddress
       Dim RemoteIP As IPAddress
       Dim str As String
       RemoteIP = IPAddress.Parse(TextBox2.Text)
       MyIP = IPAddress.Parse("912.168.1.100")
       Dim Port1 As Integer = 8080
       Dim port2 As Integer = 8081
       Dim myLocal As New IPEndPoint(MyIP, Port1)
       Dim myRemote As New IPEndPoint(RemoteIP, port2)
       Dim receive1 As New UdpClient(myRemote)
       Dim send1 As New UdpClient(myLocal)
       Try
           bytes = System.Text.Encoding.ASCII.GetBytes(TextBox1.Text.ToUpper)
           send1.Send(bytes, bytes.Length, myRemote)
           str = System.Text.Encoding.ASCII.GetString(bytes)
           TextBox3.Text = TextBox3.Text & vbCrLf & str
           bytes = receive1.Receive(myLocal)
           str = System.Text.Encoding.ASCII.GetString(bytes)
           TextBox3.Text = TextBox2.Text & vbCrLf & str
           
       Catch ex As Exception
           Console.WriteLine("")
       End Try
       send1.Close()
       receive1.Close()
   End Sub

End Class</source>