How can I programmatically re-enable a toolbar?

Here's the scenario:
1. User installs my toolbar into MSIE
2. User disables toolbar inside MSIE by right-clicking on toolbar and
un-checking it
3. User can't figure out why toolbar is gone, re-installs
4. Re-installation doesn't help, user calls and complains.

So I would like my toolbar installer to be able to (1) detect that the
user disabled the toolbar, and (2) re-enable it if so.

(1) seems reasonably straightforward, I look in [HKEY_CURRENT_USER
\Software\Microsoft\Windows\CurrentVersion\Ext\Settings] and see if my
toolbar's CLSID is there. That works.

But then if I delete my toolbar's CLSID from [...\Ext\Settings], the
next time I run MSIE, my toolbar still isn't re-enabled.

For what it's worth, during development I run MSIE 8 under XP.

Is this some security thing, that prevents me from programmatically re-
enabling a toolbar? Is there some API I need to call, instead of
directly manipulating the registry? Some weird authentication token
thingy?

Thanks,
Chris

plain and simply if you want to add a toolbar or reenable one, open internet explorer
click on view
toolbars
and just click on the toolbar you want to add back in
if you want to get rid of one uncheck it

if you want to add certain ones then go to
click on view
toolbars
customize
simply add the ones you want
or subtract the ones you don't

you'll find all these instructions in your internet explorer help file

simply open internet explorer
click on help
contents and index
type in toolbars
hit enter

all the instructions will be there
you might also be able to do it by customizing your links
simply click on the arrows next to the word links
and a drop down menu will appear
select cutomize links



you might also ask the user to please stop unchecking it.