Hi All, On cygwin, function: int poll(struct pollfd *ufds, unsigned int nfds, int timeout); The maximum of nfds = ? thanks, sangnm. -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/