tcp connexion in S7 300

Hi everyone,

I'm currently trying to connect a S7 300 and a VB NET application to exchange data.

I tried with an OPC server but my connexion crash in my VB NET program and I could not find out why.

So now I'm trying to configure a TCP connexion. I found example of WinSock application in VB NET. I established the connexion but now my problem is to send and receive data va the interface.
Can someone explain me the use of ag_send and ag_receive and their parameters.

Thanks in advance...
Bye

No more problem

nevermind, I found the correct componenet : "AxS7Data"
It really works fine with my S7 300