[RESOLVED] An address incompatible with the requested protocol was used

how can i solve this problem?

Use an address that is compatible with the requested protocol. For us to tell you any more than that, we'd have to see the code that caused the error, not just the error message.

i can't fully understand what you are saying cause i'm just a newbie in vb.net.. here's my code

Code:

---

Imports System.Net.Sockets
Imports System.Text
Imports System.Net.IPAddress
Imports System.Net.IPHostEntry
Imports System.Net

Public Class Form1
    Dim clientSocket As New System.Net.Sockets.TcpClient()
    Dim serverStream As NetworkStream
    Dim ipAddress As IPAddress = Dns.GetHostEntry("localhost").AddressList(0)

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim serverStream As NetworkStream = clientSocket.GetStream()
        Dim outStream As Byte() = _
        System.Text.Encoding.ASCII.GetBytes("Message from Client$")
        serverStream.Write(outStream, 0, outStream.Length)
        serverStream.Flush()

        Dim inStream(10024) As Byte
        serverStream.Read(inStream, 0, CInt(clientSocket.ReceiveBufferSize))
        Dim returndata As String = _
        System.Text.Encoding.ASCII.GetString(inStream)
        MsgBox("Data from Server : " + returndata)
    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        MsgBox("Client Started")
        clientSocket.Connect(ipAddress, 8080)
        TextBox1.Text = "Client Socket Program - Server Connected ..."
    End Sub

    Sub msg(ByVal mesg As String)
        TextBox1.Text = TextBox1.Text + Environment.NewLine + " >> " + mesg
    End Sub
End Class

---

can you please tell me what to do? i'm using vista.. ive searched that error in the internet and it says that i'm trying to connect to an IPv6 address / IP without the IPv6 stack installed. i checked the settings of my network connections and i saw that ipv4 and ipv6's checkbox are both checked.. i've tried to install ipv6 on the command prompt.. i typed netsh interface ipv6 install.. but it says that 'the following command was not found: install'

help please..

Presumably AddressList(0) is an IPv6 address. If you want to connect to the local machine then you may as well just use IPAddress.Loopback.

finally!!!!!!!!!!!!!

thanks a lot bro!!!

great job!

one more question please..

what if i want to get the ipaddress of another computer? for example, 112.203.80.0 visual studio reads that ipaddress as string so i can't put it in the parameter of tcplistener or socket.connect.. what will i do to convert it to ipadress that the visual studio can read? (not string)

You need to create an IPAddress object, i.e. an instance of the IPAddress class. Read the documentation for that class and you'll find out how to do that. Always read the relevant documentation first.