Basic dsp UDP question

Hello,

I am new to networking. I want to communicate between 2 computers using UDP. I've been searching through Matlab's help section and stumbled across the dsp.UDPSender/Receiver functions. I am still a bit unsure as how these work.

From my understanding, this is the basic idea of how dsp.UDP works

Sending computer:

Sender=dsp.UDPSender(‘RemoteIPAddress’,’reciever.IP.Address’);
% reciever.IP.Address is the IP of the dsp.UDPReceiver

   Var=rand(1,256);
  Step(Sender, Var)

Release(Sender)

Receiving computer

% while sender is sending info
Receiver= dsp.UDPReceiver

Var2=Step(Receiver)

Release(Receiver)

Is this set up correct? I am unsure how the step() command works. I understand it transmits data, but I don’t know when to tell the Receiver to step(). Do I run both of these at the same time? Is there a way I can make sure that data is actually being sent?

Thanks in advance,

Matt