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From: ccc_ldo@waikato.ac.nz (Lawrence D'Oliveiro)
Newsgroups: comp.sys.mac.programmer
Subject: Re: question about QuickDraw regions
Message-ID: <199.25ed68c3@waikato.ac.nz>
Date: 1 Mar 90 06:22:36 GMT
References: <850@eplunix.UUCP>
Lines: 10

If I may quote from the Old Testament, page I-182:

"CloseRgn does *not* create the destination region: space must already
have been allocated for it."

In other words, CloseRgn acts like every other call that takes one
or more region arguments: you've got to allocate the regions first,
using NewRgn, and dispose of them after use, with DisposeRgn.

In other words--yes, your code will always work.