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From: shaunc@gold.gvg.tek.com (Shaun Case)
Newsgroups: comp.os.msdos.programmer
Subject: what are the valid ranges for XMS EMB handles?
Message-ID: <2516@gold.gvg.tek.com>
Date: 13 Jun 91 04:21:20 GMT
Sender: shaunc@gold.gvg.tek.com
Organization: Grass Valley Group, Grass Valley, CA
Lines: 25

I need to search through all allocated XMS EMBs quickly.  If possible,
I would like to limit the search to valid (i.e., possilbe) XMS EMB
handles.  I already know how to tell if a given handle is valid,
but it takes too long to search through 2,000+ handles!

EMS handles seem to start at 0 and go up from there.  Do XMS handles
also start at 0?  

There seems to be a .375Kbytes allocated per handle relationship,
from my own crude testing.  Is this right?  If so, can I start
seeking at handle 239?

I read XMS.TXT from XMS20.ARC on simtel, which is supposedly the
XMS spec from microsoft.  I wasn't impressed.  It says that
"handles are a scarce resource" but doesn't say what range they
fall into.  

What are they, anyway?  Pointers to start blocks?  Tags that get
hashed into a table in the XMS driver with pointers to EMBs?

Any help would be greatly appreciated, either in email or post.

Help me out, I'm working on PD software!

Shaun.