Hello ! I'm looking for the CancelIo() function of the Win32-API , but can't find it in the header-files or libraries. I'm using B20.1 at NT 4.0 SP 5. Any help ? Is there any other possibility to cancel a pending input (ReadFile() from COM-port) ? André -- Want to unsubscribe from this list? Send a message to cygwin-unsubscribe@sourceware.cygnus.com