udp broadcast example, please

[Torsten Rueger]

Moi,

sorry, but I've searched and searched to find exact information on how 
to do a simple udp broadcast client/server, but can find it:

I want to have a thread pinging (very small message) and possibly the 
same thread receiving maybe with a 1 second timeout. And the same code 
should be able to run as multiple instances on the same machine.

Could someone with experience please post the 10 lines to make this 
happen. Please no general comments or things that "should" work. I've 
tried for hours with various socket options and addresses, so I would 
very much appreciate working code.

Thanks
   Torsten