Messenger Server Coding

Private Sub Cmd_Send_Click()
On Error GoTo Ex
Dim iVal As Long
If Len(Txt_Ser_Msg) > 0 Then
 For iVal = 1 To Win_Server.UBound
  Win_Server(iVal).SendData "Server : " + Trim(Txt_Ser_Msg.Text)
 Next iVal
 Txt_Show_Msg = Txt_Show_Msg + vbCrLf + "Server : " + Trim(Txt_Ser_Msg.Text)
 Txt_Ser_Msg.Text = ""
End If
Exit Sub
Ex:
 MsgBox "No more client available..."
End Sub
Private Sub Command1_Click()
If Lst_Usr.ListIndex <> -1 Then Win_Server_Close CInt(Mid$(Lst_Usr.List_
(Lst_Usr.ListIndex), 6, 2))
End Sub


Private Sub Command2_Click()
End
End Sub


Private Sub Form_Load()
Command1.Caption = "&Disconnect"
Command2.Caption = "&Exit"
Win_Server(0).LocalPort = 1002
Win_Server(0).Listen
'frmClient.Show
End Sub


Private Sub Txt_Ser_Msg_KeyDown(KeyCode As Integer, Shift As Integer)
If KeyCode = 13 Then
 Call Txt_Ser_Msg_Validate(True)
End If
End Sub
Private Sub Txt_Ser_Msg_Validate(Cancel As Boolean)
 Call Cmd_Send_Click
End Sub
Private Sub Win_Server_Close(Index As Integer)
Dim iVal As Long
      
    For iVal = 1 To Win_Server.UBound
        If Win_Server(iVal).State = sckConnected Then
            Win_Server(iVal).SendData Win_Server(Index).RemoteHostIP_
		+ " DISCONNECTED" + vbCrLf
            DoEvents
        End If
    Next iVal
    Win_Server(Index).Close
    For iVal = 0 To Lst_Usr.ListCount - 1
        If InStr(1, Lst_Usr.List(iVal), "User " + Format$(Index, "00"))_
		<> 0 Then
          Lst_Usr.RemoveItem iVal
          Exit For
        End If
    Next iVal
    If Index = Win_Server.UBound Then
        Unload Win_Server(Index)
    End If
End Sub


Private Sub Win_Server_ConnectionRequest(Index As Integer, ByVal requestID_
	As Long)
Dim iVal As Long
    Dim TotalConnect As Long
    Dim Acceptor As Long
      
    Acceptor = 0
    TotalConnect = 1
    For iVal = 1 To Win_Server.UBound
        Select Case Win_Server(iVal).State
            Case sckConnected
                TotalConnect = TotalConnect + 1
            Case sckClosed
                Acceptor = iVal
        End Select
    Next iVal
    If Acceptor = 0 Then Acceptor = Win_Server.Count
    If Acceptor > Win_Server.UBound Then Load Win_Server(Acceptor)
    With Win_Server(Acceptor)
        .Accept requestID
        Lst_Usr.AddItem "User " + Format$(Acceptor, "00") + " - "_
		 + .RemoteHostIP
        .SendData "Server hosted on " + _
            Win_Server(0).LocalIP + vbCrLf + "Total sessions connected: "_
		+ CStr(TotalConnect) + vbCrLf + vbCrLf
        DoEvents
    End With
    'ANNOUNCE THE NEW CONNECTION TO EVERYONE
    For iVal = 1 To Win_Server.UBound
        If Win_Server(iVal).State = sckConnected And iVal <> Acceptor Then
          Win_Server(iVal).SendData "From SERVER: " + Win_Server(Acceptor)._
		RemoteHostIP + " has joined session." + vbCrLf
          DoEvents
        End If
    Next iVal
    
' Check if the control's State is closed. If not,
    ' close the connection before accepting the new
    ' connection.
 'If Win_Server(Index).State <> sckClosed Then _
  'Win_Server(Index).Close
    ' Accept the request with the requestID
    ' parameter.
  'Win_Server(Index).Accept requestID
End Sub
Private Sub Win_Server_DataArrival(Index As Integer, ByVal bytesTotal_
	As Long)


' Declare a variable for the incoming data.
    ' Invoke the GetData method and set the Text
    ' property of a TextBox named txtOutput to
    ' the data.
    Dim strData As String
    Dim iVal As Long
      
    Win_Server(Index).GetData strData, vbString
    Win_Server(Index).Tag = Win_Server(0).Tag + strData
    If InStr(1, Win_Server(Index).Tag, vbCr) Then
        Win_Server(Index).SendData vbCrLf
        DoEvents
        'SEND THE BUFFER TO EVERYONE
        For iVal = 1 To Win_Server.UBound
            If Win_Server(iVal).State = sckConnected And iVal <> Index Then
                Win_Server(iVal).SendData "From " + Win_Server(Index)._
			RemoteHostIP + ": " + Win_Server(Index).Tag
                DoEvents
            End If
        Next iVal
        Win_Server(Index).Tag = ""
    Else
        'ECHO THE TEXT BACK TO THE LOCAL TERMINAL
        Win_Server(Index).SendData strData
    End If
      
    
'    Win_Server.GetData strData
    Txt_Show_Msg.Text = Txt_Show_Msg.Text + vbCrLf + strData
End Sub