Here is example:

On the new form put two WinSock controls (OleControl1 and OleControl2) and two command buttons (Command1 and Command2). Set the following properties:

OleControl1:

LocalPort = 1000
Protocol = 1 - UDP Protocol
RemoteHost = 127.0.0.1
RemotePort = 1001

OleControl2:

LocalPort = 1001
Protocol = 1 - UDP Protocol
RemoteHost = 127.0.0.1
RemotePort = 1000

The code:

Forms Init:

thisform.olecontrol1.bind
thisform.olecontrol2.bind

Command1 Click:

thisform.olecontrol1.sendData("Hello from OleControl1")

Command2 Click:

thisform.olecontrol2.sendData("Hello from OleControl2")

OleControl1 DataArrival:

Debug
susp
a = ""
this.getData(@a)
a = a

OleControl2 DataArrival:

Debug
susp
b = ""
this.getData(@b)
b = b

In DataArrival events I put debug/susp to trace this code line by line (rows a = a and b = b is to execute previous row (with GetData) and stay into event code). When you click on the command button, in other OleControl will be raised DataArrival event and you can see how data is received through UDP.