Winsock Confusion!

[nzer]

Hi,

Just started trying to make a simple messinging program in VB using winsock.. i really can't see what is going wrong!.. anyway.. i'll post up the code of the send program and the receive program.. maybe its really obvious hah i just don't see it!

THE SENDER

Option Explicit
Dim strOutgoing As String
Dim strIP As String


Private Sub cmdSendMsg_Click()
strIP = txtHostName.Text
strOutgoing = txtMessage.Text
winsock.RemoteHost = strIP
winsock.RemotePort = 201
winsock.Connect
Do Until winsock.State = sckConnected
DoEvents: DoEvents: DoEvents: DoEvents
If winsock.State = sckError Then
MsgBox "Problem connecting!"
Exit Sub
End If
Loop

winsock.SendData (strOutgoing)
winsock.Close
End Sub


THE RECEIVER

Private Sub Form_Load()
winsock.LocalPort = 201
winsock.Listen
End Sub

Private Sub winsock_ConnectionRequest(ByVal requestID As Long)
If winsock.State <> sckClosed Then winsock.Close
winsock.Accept requestID
End Sub

Private Sub winsock_DataArrival(ByVal bytesTotal As Long)
Dim strIncoming As String
winsock.GetData strIncoming
lblMessage.Caption = strIncoming
End Sub


Thanks for your help, i always get my error msg "Can't connect" so obviously something goes wrong :-(

[Good Dreams]

Are the Sender program and receiver program in the same computer? If yes I think that's the problem.

[nzer]

well yes they are.. but they should still work using 127.0.0.1 shouldn't they?

[Good Dreams]

Well that I don't know. You would better try using two computers. I have downloaded once a vb project (here in vb world) that with a small change it would work with the same computer, but with me, it didn't work.

It's rather confusing the stuff of dynamical IPs. Thanks to a vb project, the IP of my dad's computer is 127.0.0.1 ...

Find a friend who is willing to try it with you. I think it's the best you can do

[ccoder]

Originally posted by nzer
well yes they are.. but they should still work using 127.0.0.1 shouldn't they?

IP address 127.0.0.1 is called the loopback address. A loopback address is an address that tells the computer to test its own basic network setup. Data is passed within the local TCP/IP stack.

My first question would be "Is the TCP/IP protocol installed on your PC"? If so, you can use 127.0.0.1 to test both the client and the server on your PC. I have done that my self even though I have static IP addresses on my PCs.