Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!oliveb!amdahl!apple!well!ewhac
From: ewhac@well.UUCP (Leo L. Schwab)
Newsgroups: comp.sys.amiga.tech
Subject: Re: SetFunction
Keywords: can't get it work
Message-ID: <11263@well.UUCP>
Date: 7 Apr 89 10:44:03 GMT
References: <518@hvrunix.UUCP> <946@applix.UUCP> <3717@amiga.UUCP>
Reply-To: ewhac@well.UUCP (Leo 'Bols Ewhac' Schwab)
Organization: Spam Creation and Distribution Squad, Terra Linda, CA
Lines: 29
Quote: Why ask, "What if...?" when you can ask, "Who cares?"

In article <3717@amiga.UUCP> kodiak@tooter.UUCP (Robert R. Burns) writes:
>In article <518@hvrunix.UUCP> ahinds@hvrunix.UUCP (Alexander Hinds) writes:
>>	SetFunction(IntuitionBase,(long)-60,&MyFunction);
>>I used -60 because it is DisplayBeep() offeset.(I think).
>
>er, why mess with numbers?
>
>    extern int LVODisplayBeep;
>
>    SetFunction(IntuitionBase, &LVODisplayBeep, &MyFunction);
>
	Is this the Officially Supported way to do this?  Since all the _LVO
offsets are declared as:

_LVOFooBarAndGrill	EQU	-3276

	I always wondered what a kosher way to reference those values from C
was.  The (untested) method I thought of was:

	extern int	LVOFooBarAndGrill[];
	SetFunction (LibraryBase, LVOFooBarAndGrill, ReplacementFunction);

	Are there other approaches?

_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
Leo L. Schwab -- The Guy in The Cape	INET: well!ewhac@ucbvax.Berkeley.EDU
 \_ -_		Recumbent Bikes:	UUCP: pacbell > !{well,unicom}!ewhac
O----^o	      The Only Way To Fly.	      hplabs / (pronounced "AE-wack")
"Work FOR?  I don't work FOR anybody!  I'm just having fun."  -- The Doctor