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Inside Macintosh: Macintosh Toolbox Essentials /

Chapter 2 - Event Manager / Event Manager Reference

Event Manager Routines / Reading the Mouse

Button

You can use the Button function to determine whether the user pressed the
mouse button.

FUNCTION Button: Boolean;

DESCRIPTION

The Button function looks in the Operating System event queue for a mouse-down event. If it finds one, the Button function returns TRUE; otherwise, it returns FALSE. To determine whether the mouse button is still down after a mouse-down event, use the StillDown function.

SEE ALSO

See "The Event Queue" on page 2-83 for information about the Operating System
event queue.