^--- Thank you, clear as day. However, if you want to wrap KEY_TAB + key_lastpressed(key released) you can use a function from keys.c.
key_hit (var number)
Returns nonzero when the key with the given scan code (1..256, see key mapping) was pressed since the last key_hit call. It can be used in a while()..wait() loop to detect the moment when the key was pressed down.
key_hit (STRING* keystr)
Returns nonzero when the key belonging to given character string (f.i. "a", "f1", "esc" - see key mapping) was pressed since the last key_hit call. It can be used in a while()..wait() loop to detect the moment when the key was pressed down. A usage example can be found in the camera.c code.
key_hit(-x-) followed by not !key_hit(-x-) in a while/if
