Hi. > I tried using > "peek-char" but it seems it's blocking. What should I use in this > situation? I'm pretty sure you're looking for INPUT-PORT-TIMEOUT-SET! http://dynamo.iro.umontreal.ca/~gambit/wiki/index.php?title=Documentation:Procedure_input-port-timeout-set! Cheers, P! -- Français, English, 日本語, 한국어