kbd$ Example
10 CLEAR SCREEN
20 PRINT "Type ""A"""
30 ON KBD ALL GOSUB Keyhit ! defines event branch for keyboard input
40 REPEAT
50 UNTIL Buf$="A"
60 STOP
70 Keyhit: ! Branch taken upon key press
80 Buf$=KBD$ ! KBD$ returns key to Buf$
90 IF Buf$="A" THEN PRINT "Thank You"
100 RETURN
110 END
