[THIN] Re: Different file type association for users on the same Server
- From: "Mack, Rick" <RMack@xxxxxxxxxxxxxx>
- To: "'thin@xxxxxxxxxxxxx'" <thin@xxxxxxxxxxxxx>
- Date: Sun, 20 Oct 2002 12:14:16 +1000
Hi,
It's quite p[ossible with either NT 4.0 TSE or win2k.
NT 4.0 TSE is a special case so I'll discuss that first.
The NT 4.0 TSE implementation of per-user file associations, enabled by the
command "peruser /enable", results in a gross inflation of a users profiles
(ntuser.dat) since the whole of the HKLM\Software\Clases key is replicated
in each users profile under HKCU\Software\Classes. This can result in user
profile registry sizes of 1.8 to 2.5 MB which can have a severe effect on
the number of users you can support on a system before you max out the
registry.
Per user instances of the HKCU\Software\Classes can work without impact, eg.
the outlook forms fix for for NT 4.0 TSE and Office 2000 (see technote
Q249965) but overall, unless you're willing to wear less users per server
and slower logon/logoff times, per-user file association should probably be
avoided.
Win2k is a completely different beast. Per-user file associations are always
enabled. If you run up regedt32 and look at the keys under HKEY_USERS,
you'll see keys with the user's SID and a second key with _classes
extension. This _classes hive is linked to HKCU\Software\Classes. However
there is no operating system level way to populate the users'
HKCU\Software\Classes key. So if you want per-user file associations, you'll
have to do it using scripting or regfiles.
For example, we had a customer who didn't want everyone to have access to
office, so if you weren't in the office users group, your .doc, .ppt, .xls
file associations were redirected to the appropriate office product viewer
using a simple regfile that patched HKCU\Software\Classes.
Regards,
Rick
Ulrich Mack
rmack@xxxxxxxxxxxxxx
Volante Systems
18 Heussler Terrace, Milton 4064
Queensland Australia
tel +61 7 32467704
-----Original Message-----
From: peter.hegg [mailto:peter.hegg@xxxxxxx]
Sent: Sunday, 20 October 2002 1:26 AM
To: ThinNet Techforum
Subject: [THIN] Different file type association for users on the same Server
Hi
is it possible to have different file type accociations for users on the
same computer - e.g. *.jpg files for user "A" start the normal Windows
"image viewer" and for user "B" on the same machine it starts another image
viewer application e.g. "Ifran viewer"????
Does anyone have some input on this or did I not search long enough in the
archives?
Thanks for your help
Peter
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