QBasic 1.1: ON Keyword

Explanation

ON Keyword

Worth knowing

Useful and cross-version information about the programming environments of QBasic, QuickBasic and Visual Basic for DOS.

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Description / Parameter(s)

Performs different actions as part of several statements:

Enables error trapping when used with the ON ERROR statement.
Enables event trapping when used with the event ON statements (COM ON, KEY ON, PEN ON, PLAY ON, STRIG ON, and TIMER ON).
Specifies an event to trap when used with the ON event statements (ON COM, ON KEY, ON PEN, ON PLAY, ON STRING, and ON TIMER).
Specifies an expression to evaluate when used with the ON...GOSUB and ON...GOTO statements.

See also:

COM, ON COM | KEY, ON KEY (Event Trapping) | ON ERROR | ON GOSUB, ON GOTO | PEN, ON PEN | PLAY, ON PLAY | STRIG, ON STRIG | TIMER, ON TIMER