The Scancodes Picker App (in the Blitz Help Command reference area) says you're looking for scancode 183, which is labelled SysReq (it shares the same key as Print Scrn).
Print Scrn key
BlitzMax Forums/BlitzMax Beginners Area/Print Scrn keyThe forum is locked. These are the original blitzbasic.com forums, kept so they can still be read. No new topics, replies or edits can be made here. To join in, head over to the Blitz3D+ forums.