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(Created page with "ON creates event procedure calls or enables event trapping. * Set the sub-procedure call for KEY(n), COM(n), PEN, PLAY, STRIG(n), TIMER, UEVENT * To turn on event trapping for ON COM (n), ON KEY (n), ON PEN, ON PLAY (n), ON STRIG (n), ON TIMER (n) and ON UEVENT. * In the case of ON ERROR the trap is also enabled until a subsequent ON ERROR statement. * ON procedures should be used only in the mai...") |
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* Set the sub-procedure call for [[KEY(n)]], [[ | * Set the sub-procedure call for [[KEY(n)]], [[STRIG(n)]] and [[TIMER|TIMER(n)]] | ||
* To turn on event trapping for | * To turn on event trapping for [[ON KEY(n)]], [[ON STRIG(n)]] and [[ON TIMER(n)]]. | ||
* In the case of [[ON ERROR]] the trap is also enabled until a subsequent ON ERROR statement. | * In the case of [[ON ERROR]] the trap is also enabled until a subsequent ON ERROR statement. | ||
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{{PageSeeAlso}} | |||
* [[ON...GOSUB]], [[ON...GOTO]] | |||
[[ON...GOSUB]], [[ON...GOTO]] | * [[OFF]], [[STOP]], [[KEY]] | ||
* [[$CHECKING]] | |||
[[OFF]], [[STOP]], [[KEY]] | |||
[[$CHECKING]] | |||
{{PageNavigation}} | {{PageNavigation}} | ||
Latest revision as of 16:58, 24 February 2023
ON creates event procedure calls or enables event trapping.
- To turn on event trapping for ON KEY(n), ON STRIG(n) and ON TIMER(n).
- In the case of ON ERROR the trap is also enabled until a subsequent ON ERROR statement.
- ON procedures should be used only in the main program module and not inside of SUB procedures!
- If you have used the $CHECKING:OFF metacommand, $CHECKING:ON will turn on c++ error checking again.
See also