QBasic 1.1: ON STRIG Statement

Explanation

STRIG, ON STRIG Statements

STRIG enables, disables, or suspends joystick event trapping. If event trapping is enabled, ON STRIG branches to a subroutine whenever a specified joystick trigger is pressed.

Worth knowing

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

ASCII Code Tables
Keyboard Scan Codes
Syntax Conventions
Screen Modes
Color Attributes
Error Codes

You are here: References Overview > QBasic 1.1 Commands List > ON STRIG Statement

Syntax

STRIG(n%) ON

STRIG(n%) OFF

STRIG(n%) STOP

ON STRIG(n%) GOSUB line

Description / Parameter(s)

A value that specifies a joystick trigger:

n%	Trigger
0	Lower trigger, joystick A
2	Lower trigger, joystick B
4	Upper trigger, joystick A
6	Upper trigger, joystick B

STRIG(n%) ON

Enables joystick event trapping.

STRIG(n%) OFF

Disables joystick event trapping.

STRIG(n%) STOP

Suspends joystick event trapping. Events are processed once event trapping is enabled by STRIG ON.

line

The label or number of the first line of the event-trapping subroutine.

Example


    'This example requires a joystick.
    ON STRIG(0) GOSUB Handler
    STRIG(0) ON
    PRINT "Press Esc to exit."
    DO UNTIL INKEY$ = CHR$(27): LOOP
    END
 
Handler:
    PRINT "Joystick trigger is depressed."
    RETURN