How to make a nonblocking receive socket?

Hi, all :)

How to create a no blocking/waiting socket for receiving?
So that if there is no incoming data available for the socket at the function "recvfrom" it would continue instead of waiting for incoming data. Can you make the socket nonblocking or must you make the recievning function nonblocking? Is it possible to do this without having multithreads or network events?

I can't seem to find the functions FD_ZERO() and FD_SET()?
What header to a need to include?

OK sorry... I thought they where function... and when they didn't show any tooltip info (i VC++) I thought they wheren't declared.

I tested your code but it didn't work, the recvfrom() still blocked.
I also tested changing the timeout time but that didn't help.

The socket I am trying to make nonblocking is an UDP socket that is unconnected.

The point of using select is to call recvfrom() only when there is indeed something to receive. This is the nonblocking aspect of what you're doing. Instead of always trying to receive you do it when there's data.