Path: utzoo!dciem!mmt
From: mmt@dciem.dciem.dnd.ca (Martin Taylor)
Newsgroups: comp.sys.mac.hypercard
Subject: Re: an exists(object) function ?
Keywords: HyperTalk
Message-ID: <3001@dciem.dciem.dnd.ca>
Date: 27 Mar 90 00:34:42 GMT
References: <2308@network.ucsd.edu>
Reply-To: mmt@dretor.dciem.dnd.ca (Martin Taylor)
Organization: D.C.I.E.M., Toronto, Canada
Lines: 23


Paul Biron wants to know whether there exists an XFCN that can determine
whether an obejct exists.  Yes, this object exists.  It is called
ObjectExists, and is in the Dartmouth XCMDs 3.1 stack.  It checks for
the existence of any object of a type known to Hypercard.  Here are the
examples from the bottom of the information field:
get ObjectExists("card field Watusi")
get ObjectExists("bg btn 15")
get ObjectExists("card id 2731")
get ObjectExists("stack home")
get ObjectExists("background WildCard")

Don't ask me where I got the stack. It was either on comp.binaries.mac or
from the sumex archives.  The stack is freely distributable, but it you
want to use the source code, documentation, or Mac resources commercially,
you must communciate with
Office of Industrially Sponsored Research
P.O. Box 7
Dartmouth College
Hanover, NH 03755
-- 
Martin Taylor (mmt@zorac.dciem.dnd.ca ...!uunet!dciem!mmt) (416) 635-2048
"Viola, the man in the room doesn't UNDERSTAND Chinese. Q.E.D."  (R. Kohout)