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ON Keyword - Different Uses
i
ON
Keyword - Different Uses
The ON keyword is used in various statements to trap events:
Specifies a trap Type of event Enables the trap
ON COM(n)
events on communications port n
COM(n) ON
ON KEY(n)
a keystroke on key n
KEY(n) ON
ON PEN
lightpen events
PEN ON
ON PLAY(n)
less than n notes in music buffer
PLAY ON
ON STRIG(n)
events on joystick trigger n
STRIG(n) ON
ON TIMER(n)
timer events
TIMER ON
ON UEVENT
user-defined events
UEVENT ON
Other uses of the ON keyword are:
ON ERROR
- to enable error handling and specify the error-handling routine
ON...GOSUB
- to branch to one of a list of subroutines
ON...GOTO
- to branch to one of a list of line labels
