Legacy Document

Inside Macintosh: Imaging With QuickDraw /

Chapter 3 - QuickDraw Drawing / QuickDraw Drawing Reference

Routines / Creating and Managing Regions

EqualRgn

To determine whether two regions have identical sizes, shapes, and locations, use the EqualRgn function.

FUNCTION EqualRgn (rgnA,rgnB: RgnHandle):\xDDBoolean;

srcRgnA

A handle to the first of two regions to compare.

srcRgnB

A handle to the second of two regions to compare.

DESCRIPTION

The EqualRgn function compares the two regions whose handles you pass in the rgnA and rgnB parameters and returns TRUE if they're equal or FALSE if they're not.

The two regions must have identical sizes, shapes, and locations to be considered equal. Any two empty regions are always equal.