Winsock question about the tutorial on vbworld.com

[EviLEyE]

Hey everybody,
I am pretty new to the whole visual basic scene, but I am very interested. So far, I have read 2 full tutorials on vbworld.com by Karl Moore.
He is my question.
I have read half of the Winsock tutorial and made the two programs; the receiver and sender.
here is the code....
Sender:


Private Sub Command1_Click()
If Winsock1.State <> sckClosed Then Winsock1.Close
Winsock1.RemotePort = 1008
Winsock1.RemoteHost = "192.168.1.0, also tried 127.0.0.1, and 192.168.1.1"
Winsock1.Connect
Do Until Winsock1.State = sckConnected
DoEvents: DoEvents: DoEvents: DoEvents
If Winsock1.State = sckError Then
MsgBox "Problem connecting!"
Exit Sub
End If
Loop
Winsock1.SendData (txtMessage.Text)
Winsock1.Close
End Sub

The receiver:

Private Sub form_load()
Winsock1.LocalPort = 1008
Winsock1.Listen
End Sub

Private Sub Winsock1_ConnectionRequest(ByVal requestID As Long)
If Winsock1.State <> sckClosed Then Winsock1.Close
Winsock1.Accept requestID
End Sub


Private Sub Winsock1_DataArrival(ByVal bytesTotal As Long)
Dim strIncoming As String
Winsock1.GetData strIncoming
MsgBox strIncoming
End Sub


The problem is it doesn't work... Whenever I try to send a message it gives me the sckerror.
I have a network over a linksys router, and I tried both over the network and over one computer.
Both tries failed.
If anyone could be kind enough to help me out here, I would greatly appreciate it.

Thanks in advance.

[ccoder]

The 2 statements:

Winsock1.SendData (txtMessage.Text)
Winsock1.Close

will cause a problem. The SendData method will execute asyncronously. This means that as it is executing, VB will proceed to execute the Close method. This usually results in no data reaching the server.

There are dozens of posts from new users like yourself who used this example to learn sockets programming and had problems.

My first question is - do you need to close the connection after you send the data? If so, add a Winsock1_SendComplete sub and put close the connection there.

A socket connection is just like a phone call. Both sides can 'talk' to each other for as long as is needed. Once the conversation is finished, one side can close the connection and the other side can detect the close (in a Winsock1_Close sub) and close their socket.

So, if you need to get a reply to the send or you need to send more than 1 data item, you will need to keep the socket open.

[EviLEyE]

Hey,
Thank you very much for the reply; it worked.
Thanks alot again.