Getting the error "Only one usage of each socket address (protocol/network address/port) is normally permitted" in vb.net 10 - vb.net

Question

I am making a simple tcp communication program just to send strings I keep reciving
Only one usage of each socket address (protocol/network address/port) is normally permitted
I have run the exact same code on windows 8, in witch case it works fine, but on 7 i get this error.( I need it to run on 7)
here is my code( It is a fake virus not intended for any harm):
{
Imports IWshRuntimeLibrary
Public Class Form1
Dim virus As Boolean = False
'Public IsClosing As Boolean = False
Private _Server As New TcpCommServer(AddressOf UpdateUI)
Private _Server2 As New TcpCommServer(AddressOf UpdateUI2)
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
_Server.Start(32800)
_Server2.Start(32801)
If My.Settings.autostart = False Then
Dim startupPath As String = Environment.GetFolderPath(Environment.SpecialFolder.Startup)
Dim executablePath As String = System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName
Dim executableName As String = System.Diagnostics.Process.GetCurrentProcess().MainModule.ModuleName
'create shortcut
Dim Shell As WshShell
Dim Link As WshShortcut
Try
Shell = New WshShell
Link = CType(Shell.CreateShortcut(startupPath & "\" & executableName & ".lnk"), IWshShortcut)
Link.TargetPath = executablePath
Link.Save()
Catch ex As Exception
MsgBox(ex.Message)
End Try
My.Settings.autostart = True
ElseIf My.Settings.autostart = True Then
End If
End Sub
Private Function BytesToString(ByVal data() As Byte) As String
Dim enc As New System.Text.UTF8Encoding()
BytesToString = enc.GetString(data)
End Function
Private Function StrToByteArray(ByVal text As String) As Byte()
Dim encoding As New System.Text.UTF8Encoding()
StrToByteArray = encoding.GetBytes(text)
End Function
Private Function BytesToString2(ByVal data() As Byte) As String
Dim enc2 As New System.Text.UTF8Encoding()
BytesToString2 = enc2.GetString(data)
End Function
Private Function StrToByteArray2(ByVal text As String) As Byte()
Dim encoding2 As New System.Text.UTF8Encoding()
StrToByteArray2 = encoding2.GetBytes(text)
End Function
Public Sub UpdateUI(ByVal bytes() As Byte, ByVal sessionID As Int32, ByVal dataChannel As Integer)
If Me.InvokeRequired() Then
' InvokeRequired: We're running on the background thread. Invoke the delegate.
Me.Invoke(_Server.ServerCallbackObject, bytes, sessionID, dataChannel)
Else
' We're on the main UI thread now.
If dataChannel = 1 Then
Me.lbtextinput.Text = (BytesToString(bytes))
ElseIf dataChannel = 255 Then
Dim tmp = ""
Dim msg As String = BytesToString(bytes)
Dim dontReport As Boolean = False
' _Server as finished sending the bytes you put into sendBytes()
If msg.Length > 3 Then tmp = msg.Substring(0, 3)
If tmp = "UBS" Then ' User Bytes Sent.
Dim parts() As String = Split(msg, "UBS:")
msg = "Data sent to session: " & parts(1)
End If
End If
End If
End Sub
Public Sub UpdateUI2(ByVal bytes() As Byte, ByVal sessionID As Int32, ByVal dataChannel As Integer)
If Me.InvokeRequired() Then
' InvokeRequired: We're running on the background thread. Invoke the delegate.
Me.Invoke(_Server2.ServerCallbackObject, bytes, sessionID, dataChannel)
Else
' We're on the main UI thread now.
If dataChannel = 1 Then
MsgBox(BytesToString2(bytes))
ElseIf dataChannel = 255 Then
Dim tmp = ""
Dim msg As String = BytesToString2(bytes)
Dim dontReport As Boolean = False
' _Server as finished sending the bytes you put into sendBytes()
If msg.Length > 3 Then tmp = msg.Substring(0, 3)
If tmp = "UBS" Then ' User Bytes Sent.
Dim parts() As String = Split(msg, "UBS:")
msg = "Data sent to session: " & parts(1)
End If
End If
End If
End Sub
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
If lbtextinput.Text = "Start Virus" Then
virus = True
ElseIf lbtextinput.Text = "Stop Virus" Then
virus = False
End If
End Sub
Private Sub Timer2_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer2.Tick
If virus = True Then
Form2.Show()
Else
Form2.Hide()
End If
End Sub
End Class
} Form1
Now a linked class {
Imports System.IO
Imports System.Runtime.InteropServices
Public Class clsAsyncUnbuffWriter
Public Class clsSystemInfo
Private Class WinApi
<DllImport("kernel32.dll")> _
Public Shared Sub GetSystemInfo(<MarshalAs(UnmanagedType.Struct)> ByRef lpSystemInfo As SYSTEM_INFO)
End Sub
<StructLayout(LayoutKind.Sequential)> _
Public Structure SYSTEM_INFO
Friend uProcessorInfo As _PROCESSOR_INFO_UNION
Public dwPageSize As UInteger
Public lpMinimumApplicationAddress As IntPtr
Public lpMaximumApplicationAddress As IntPtr
Public dwActiveProcessorMask As IntPtr
Public dwNumberOfProcessors As UInteger
Public dwProcessorType As UInteger
Public dwAllocationGranularity As UInteger
Public dwProcessorLevel As UShort
Public dwProcessorRevision As UShort
End Structure
<StructLayout(LayoutKind.Explicit)> _
Public Structure _PROCESSOR_INFO_UNION
<FieldOffset(0)> _
Friend dwOemId As UInteger
<FieldOffset(0)> _
Friend wProcessorArchitecture As UShort
<FieldOffset(2)> _
Friend wReserved As UShort
End Structure
End Class
Public Shared Function GetPageSize() As Integer
Dim sysinfo As New WinApi.SYSTEM_INFO()
WinApi.GetSystemInfo(sysinfo)
Return CInt(sysinfo.dwPageSize)
End Function
End Class
Private target As FileStream
Private inputBuffer As MemoryStream
Private bufferSize As Integer
Private running As Boolean
Private writing As Boolean
Private readWait As Threading.ManualResetEvent
Private writeWait As Threading.ManualResetEvent
Private finishedWriting As Threading.ManualResetEvent
Private totalWritten As Int64
Private writeTimer As Stopwatch
Public Function GetTotalBytesWritten() As Int64
Return totalWritten
End Function
Public Function IsRunning() As Boolean
Return running
End Function
Public Sub Close()
writing = False
writeWait.Set()
finishedWriting.WaitOne()
readWait.Set()
End Sub
Public Function GetActiveMiliseconds() As Int64
Try
Return writeTimer.ElapsedMilliseconds
Catch ex As Exception
Return 0
End Try
End Function
Public Shared Function GetPageSize() As Integer
Return clsSystemInfo.GetPageSize
End Function
Public Sub New(ByVal dest As String, _
Optional ByVal unbuffered As Boolean = False, _
Optional ByVal _bufferSize As Integer = (1024 * 1024), _
Optional ByVal setLength As Int64 = 0)
bufferSize = _bufferSize
Dim options As FileOptions = FileOptions.SequentialScan
If unbuffered Then options = FileOptions.WriteThrough Or FileOptions.SequentialScan
readWait = New Threading.ManualResetEvent(False)
writeWait = New Threading.ManualResetEvent(False)
finishedWriting = New Threading.ManualResetEvent(False)
readWait.Set()
writeWait.Reset()
finishedWriting.Reset()
target = New FileStream(dest, _
FileMode.Create, FileAccess.Write, FileShare.None, GetPageSize, options)
If setLength > 0 Then target.SetLength(setLength)
totalWritten = 0
inputBuffer = New MemoryStream(bufferSize)
running = True
writing = True
writeTimer = New Stopwatch
Dim asyncWriter As New Threading.Thread(AddressOf WriteThread)
With asyncWriter
.Priority = Threading.ThreadPriority.Lowest
.IsBackground = True
.Name = "AsyncCopy writer"
.Start()
End With
End Sub
Public Function Write(ByVal someBytes() As Byte, ByVal numToWrite As Integer) As Boolean
If Not running Then Return False
If numToWrite < 1 Then Return False
If numToWrite > inputBuffer.Capacity Then
Throw New Exception("clsAsyncUnbuffWriter: someBytes() can not be larger then buffer capacity")
End If
If (inputBuffer.Length + numToWrite) > inputBuffer.Capacity Then
If inputBuffer.Length > 0 Then
readWait.Reset()
writeWait.Set()
readWait.WaitOne()
If Not running Then Return False
inputBuffer.Write(someBytes, 0, numToWrite)
End If
Else
inputBuffer.Write(someBytes, 0, numToWrite)
End If
Return True
End Function
Private Sub WriteThread()
Dim bytesThisTime As Int32 = 0
Dim internalBuffer(bufferSize) As Byte
writeTimer.Stop()
writeTimer.Reset()
writeTimer.Start()
Do
writeWait.WaitOne()
writeWait.Reset()
bytesThisTime = CInt(inputBuffer.Length)
Buffer.BlockCopy(inputBuffer.GetBuffer, 0, internalBuffer, 0, bytesThisTime)
inputBuffer.SetLength(0)
readWait.Set()
target.Write(internalBuffer, 0, bytesThisTime)
totalWritten += bytesThisTime
Loop While writing
' Flush inputBuffer
If inputBuffer.Length > 0 Then
bytesThisTime = CInt(inputBuffer.Length)
Buffer.BlockCopy(inputBuffer.GetBuffer, 0, internalBuffer, 0, bytesThisTime)
target.Write(internalBuffer, 0, bytesThisTime)
totalWritten += bytesThisTime
End If
running = False
writeTimer.Stop()
finishedWriting.Set()
Try
target.Close()
target.Dispose()
Catch ex As Exception
End Try
inputBuffer.Close()
inputBuffer.Dispose()
inputBuffer = Nothing
internalBuffer = Nothing
target = Nothing
GC.GetTotalMemory(True)
End Sub
End Class
} Public Class clsAsyncUnbuffWriter
Now I do have one more chunk of code but it wont fit so I will post it later. all these chunks call to each other.
please help.