Re: Unable to display the user selection dialog (null)

From: Shawn Fessenden (shawn_at_testech-ldt.com)
Date: 07/31/04 

Date: Sat, 31 Jul 2004 13:53:29 GMT

SOLVED!

> David Dickinson

David, thank you for your help - your prompt for more information led me to
search the net again, and I found a fix.

I have no idea why it makes a difference or what messed things up, but the
HKEY_CLASSES_ROOT\LDAP key was missing. I was led to this key by a posting
to whatismyipaddress.com:
http://www.whatismyipaddress.com/forums/post.asp?method=ReplyQuote&REPLY_ID=887&TOPIC_ID=402&FORUM_ID=8

User "cleverett" posted the crucial clue. This article also references KB
article:

http://support.microsoft.com/default.aspx?scid=kb;en-us;269489

entitled "Missing HKEY_CLASSES_ROOT\LDAP\Clsid Registry Key Causes Numerous
Errors. I then found that the whole LDAP key was missing. I checked another
of my Windows 2000 computers and found the following:

HKEY_CLASSES_ROOT\LDAP:
(Default), REG_SZ, URL:LDAP Protocol
EditFlags, REG_BINARY, 02 00 00 00
URL Protocol, REG_SZ, ""

HKEY_CLASSES_ROOT\LDAP\Clsid
(Default), REG_SZ, {228D9A81-C302-11df=9AA4-00AA004A5691}

HKEY_CLASSES_ROOT\LDAP\shell
(Default}, REG_SZ, (value not set)

HKEY_CLASSES_ROOT\LDAP\shell\open
(Default), REG_SZ, (value not set)

HKEY_CLASSES_ROOT\LDAP\shell\open\command
(Default), REG_SZ, "C:\Program Files\Outlook Express\wab.exe" /ldap:%1

For those who don't know, LDAP stands for Lightweight Directory Access
Protocol. I can't imagine why this is necessary for the GUI ACL add to work,
but apparently it is.

Thank you to all for considering my problem, and especially thank you again
David who was the only one to respond.
-SHAWN-