Winsock SendData Problems [Archive]

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SteveCRM

Jul 6th, 2000, 07:46 PM

Winsock1.RemoteIP = "127.0.0.1"
Winsock1.RemotePort = 1000
Winsock1.Connect

Dim MyMessage as String
MyMessage = "Hello, My Name Is Steve"
Winsock1.SendData MyMessage

I get an error on the last line of that code. Why?

SteveCRM

Jul 6th, 2000, 08:30 PM

By the way, ive tried
Winsock1.SendData (MyMessage)
and I still got the error.

noone

Jul 6th, 2000, 09:40 PM

It looks like you are connecting to yourself, do you have a server program runnign to listen on that port? Sorry if I sound insulting.

SteveCRM

Jul 7th, 2000, 08:32 AM

No, that form that that code goes into listens to 1001, the server form sends from 1001 and listens to 1000. I asked about how many ports before. Since 1 - 1024 are reserved for http and ftp, do you think the internet is screwing me up and giving me these problems? Maybe I should make the ports lke 2000, and 2001?

Clunietp

Jul 7th, 2000, 11:02 AM

are you using TCP or UDP?

SteveCRM

Jul 7th, 2000, 11:25 AM

Every winsock control uses TCP

noone

Jul 7th, 2000, 03:30 PM

I may be reading your post wrong but it sounds like you've got the way TCP works a bit mixed up.
When you say:
Winsock1.RemoteIP = "127.0.0.1"
Winsock1.RemotePort = 1000
Winsock1.Connect1

There has to already be a server program listening to port 1000 on your machine, otherwise no connection will be established and thus you cant send any data.

SteveCRM

Jul 7th, 2000, 04:35 PM

Sorry, this is my first winsock program. What is the different between TCP and UDT?

noone

Jul 7th, 2000, 05:59 PM

The main difference between TCP and UDP is that TCP is connection oriented where UDP isnt. TCP is also much more reliable than UDP. But UDP has a much lower overhead for use then TCP.
This link might help you out with using the control:
http://www.vbsquare.com/internet/comms/

SteveCRM

Jul 7th, 2000, 09:08 PM

Thanks noone! That was the perfect tutorial! Just what I needed! :)

arachnid

Jul 8th, 2000, 06:37 PM

I would put the SendData command in the Winsock_Connect event. If you send the data before Winsock connects, you'll get an error.

SteveCRM

Jul 8th, 2000, 07:39 PM

No its connected. The start button (where the senddata is) is dissabled until connected.

FirePoweR

Jul 9th, 2000, 03:26 PM

What error are you getting?

SteveCRM

Jul 9th, 2000, 03:28 PM

Hold on, for some reason its working......thanks