yes, I guess it's line 70. Even if it isn't explicitly mentioned in the manual, INKEY$ without a channel defaults to #0, so SBASIC seems urged to open that window.
SImply change line 70 to read
Code: Select all
70 var87C4$ = INKEY$(#1,-1 ) : IF (CODE(var87C4$) = 27) THEN QUIT : END IF