🚀 go-pugleaf

In <1195@tuura.UUCP> risto@tuura.UUCP (Risto Lankinen) writes:

>James_Bell@f6.n3601.z1.fidonet.org (James Bell) writes:

>>> Does anyone know whether it's possible for a program to find out
>>> the percentage of remaining free resources, as it is posted in

>>The on-disk doc files w/the SDK tell how progman computes the system resources, 
>>but I don't think they give a function for it.  If you
>>discover/write one, let me know and/or post it!


OK, here we go. This the the "official" way of calculating the free
system resources (at least it's the way Program Manager does it) :->

DWORD	FAR PASCAL	GetHeapSpaces(HANDLE h) ;

int	GetFreeSystemResources(void)

{
	DWORD	dwHeapSize ;
	int	nUserPercent,nGdiPercent ;

	dwHeapSize = GetHeapSpaces(GetModuleHandle("user")) ;
	nUserPercent = 100*(LOWORD(dwHeapSize)/1024)/
			(HIWORD(dwHeapSize)/1024) ;
	dwHeapSize = GetHeapSpaces(GetModuleHandle("gdi")) ;
	nGdiPercent = 100*(LOWORD(dwHeapSize)/1024)/
			(HIWORD(dwHeapSize)/1024) ;
	return (min(nUserPercent,nGdiPercent)) ;
}

I got this from reverse engineering the program manager program (with
apologies to Microsoft). It uses a non-documented function call
(GetHeapSpaces whose prototype is given above) and gives the same results
as File/Program manager.

*** DISCLAIMER *** I don't guarantee this will work for any other
version of windows other than 3.0. As it uses an undocumented function
call there's no reason the function'll remain the same across
versions. However, if Microsoft use it, it must be right B->

While we're on the subject of Windows Hacking,  has anyone else found
any good undocumented functions within Windows that they might want to
share???

Cheers,
	Ian
-- 
Ian Heath,
email: ih@ecs.soton.ac.uk (BITNET) or ih@uk.ac.soton.ecs (JANET)
"And now you are alone my friend and I must set you free
 And you must face the world outside and find your destiny" - Freudiana