The UDPChat-Server Source(VB.NET)

''I use Winsock Control SP5(VB6)

Public Class frmMain
    Inherits System.Windows.Forms.Form

#Region " Windows 窗体设计器生成的代码 "

    Public Sub New()
        MyBase.New()

        ''该调用是 Windows 窗体设计器所必需的。
        InitializeComponent()

        ''在 InitializeComponent() 调用之后添加任何初始化

    End Sub

    ''窗体重写处置以清理组件列表。
    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

    ''Windows 窗体设计器所必需的
    Private components As System.ComponentModel.IContainer

    ''注意：以下过程是 Windows 窗体设计器所必需的
    ''可以使用 Windows 窗体设计器修改此过程。
    ''不要使用代码编辑器修改它。
    Friend WithEvents txtChatLog As System.Windows.Forms.TextBox
    Friend WithEvents pelSaid As System.Windows.Forms.Panel
    Friend WithEvents txtSaid As System.Windows.Forms.TextBox
    Friend WithEvents btnSend As System.Windows.Forms.Button
    Friend WithEvents sckServer As AxMSWinsockLib.AxWinsock
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(frmMain))
        Me.txtChatLog = New System.Windows.Forms.TextBox()
        Me.pelSaid = New System.Windows.Forms.Panel()
        Me.btnSend = New System.Windows.Forms.Button()
        Me.txtSaid = New System.Windows.Forms.TextBox()
        Me.sckServer = New AxMSWinsockLib.AxWinsock()
        Me.pelSaid.SuspendLayout()
        CType(Me.sckServer, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        ''
        ''txtChatLog
        ''
        Me.txtChatLog.Dock = System.Windows.Forms.DockStyle.Top
        Me.txtChatLog.Multiline = True
        Me.txtChatLog.Name = "txtChatLog"
        Me.txtChatLog.ReadOnly = True
        Me.txtChatLog.ScrollBars = System.Windows.Forms.ScrollBars.Vertical
        Me.txtChatLog.Size = New System.Drawing.Size(392, 328)
        Me.txtChatLog.TabIndex = 0
        Me.txtChatLog.TabStop = False
        Me.txtChatLog.Text = ""
        ''
        ''pelSaid
        ''
        Me.pelSaid.Controls.AddRange(New System.Windows.Forms.Control() {Me.btnSend, Me.txtSaid})
        Me.pelSaid.Dock = System.Windows.Forms.DockStyle.Bottom
        Me.pelSaid.Location = New System.Drawing.Point(0, 332)
        Me.pelSaid.Name = "pelSaid"
        Me.pelSaid.Size = New System.Drawing.Size(392, 34)
        Me.pelSaid.TabIndex = 1
        ''
        ''btnSend
        ''
        Me.btnSend.Location = New System.Drawing.Point(296, 5)
        Me.btnSend.Name = "btnSend"
        Me.btnSend.Size = New System.Drawing.Size(80, 24)
        Me.btnSend.TabIndex = 0
        Me.btnSend.Text = "Send"
        ''
        ''txtSaid
        ''
        Me.txtSaid.Location = New System.Drawing.Point(8, 6)
        Me.txtSaid.Name = "txtSaid"
        Me.txtSaid.Size = New System.Drawing.Size(280, 21)
        Me.txtSaid.TabIndex = 0
        Me.txtSaid.Text = ""
        ''
        ''sckServer
        ''
        Me.sckServer.Enabled = True
        Me.sckServer.Location = New System.Drawing.Point(16, 8)
        Me.sckServer.Name = "sckServer"
        Me.sckServer.OcxState = CType(resources.GetObject("sckServer.OcxState"), System.Windows.Forms.AxHost.State)
        Me.sckServer.Size = New System.Drawing.Size(28, 28)
        Me.sckServer.TabIndex = 2
        ''
        ''frmMain
        ''
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(392, 366)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.sckServer, Me.pelSaid, Me.txtChatLog})
        Me.MaximizeBox = False
        Me.MaximumSize = New System.Drawing.Size(400, 400)
        Me.MinimumSize = New System.Drawing.Size(400, 400)
        Me.Name = "frmMain"
        Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
        Me.Text = "UDPChat-Server"
        Me.pelSaid.ResumeLayout(False)
        CType(Me.sckServer, System.ComponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)

    End Sub

#End Region

#Region "Winsock Event"

    Private Sub sckServer_ConnectionRequest(ByVal sender As Object, ByVal e As AxMSWinsockLib.DMSWinsockControlEvents_ConnectionRequestEvent) Handles sckServer.ConnectionRequest
        txtChatLog.AppendText("Request of Connecting from " & e.requestID & vbCrLf)
        txtChatLog.AppendText("Request Accepted...." & vbCrLf)
        sckServer.Accept(e.requestID)
        sckServer.SendData("Connection Accepted...." & vbCrLf)
    End Sub

    Private Sub sckServer_DataArrival(ByVal sender As Object, ByVal e As AxMSWinsockLib.DMSWinsockControlEvents_DataArrivalEvent) Handles sckServer.DataArrival
        Dim objData As Object
        sckServer.GetData(objData, vbString)
        txtChatLog.AppendText("Client: " & CStr(objData) & vbCrLf)
    End Sub

#End Region

    Private Sub frmMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        sckServer.RemoteHost = "127.0.0.1"
        sckServer.RemotePort = 8000
        sckServer.Bind(1000)
        txtChatLog.AppendText("Binded to localhost at 1000 and Remote port 8000" & vbCrLf)
    End Sub

    Private Sub btnSend_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSend.Click
        If txtSaid.Text.Trim = "" Then
            MsgBox("Please input the chat the contents", MsgBoxStyle.OKOnly, "UDPChat-Server")
            Exit Sub
        End If

        Try
            txtChatLog.AppendText("Server: " & txtSaid.Text & vbCrLf)
            sckServer.SendData(CType(txtSaid.Text, Object))
            txtSaid.Text = ""
        Catch
            MsgBox("Error Occured " & Err.Description & vbCrLf & Err.Number, MsgBoxStyle.OKOnly, "UDPChat-Server")
        End Try
    End Sub

    Private Sub txtSaid_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtSaid.KeyPress
        If (e.KeyChar = Chr(13)) Then
            btnSend_Click(sender, New System.EventArgs())
        End If
    End Sub
End Class