#title UDP_SocketReady [RCBasic Doc]
#header Function UDP_SocketReady(socket)

Returns 0 for no activity and non zero for activity. You need to call CheckSockets() at some point before this otherwise it will always
return 0.

#code
If UDP_SocketReady ( 0 ) > 0 Then
    'Socket has activity so we can do something here
End If
#/code

#ref CheckSockets