Winsock client send large data

Hello members!
I need to implement a server side application using Winsock and TCP/IP. The client will send quite large data (some 10 Kbytes). I assume I should use a loop with Winsock.GetData but... until when? Until the Winsock.Close event? I could not find an example of this case. Can somebody give me a hint??
Should I use some kind of hand shaking?? The client side is a Rabbit module.
Thank you in advance.

Daniel (first post :wave:)