Hi !

I need to implement udp protocol in Win Forms that send some request to the broadcast address from specific port to specific port and then change to be a client and receive multiple answers from the broadcast using the same ports but in the oposite direction.
My questions are:
1.Is the first connection should use blocking (synchronous) functions ?
2.Should I close this first socket,and then open another one on the same port in order to get the broadcast answers ?
3.In which way should I get the broadcast answers:a.using asynchronous function and events like BeginSend/EndSend etc or b.using threads ?
4.How do I get multiple answers on the same port in this case ?

I will be glad to get answers/code snippets.

Tnx
AliJ