That key can be missing if Outlook is installed from a network drive.
A better approach might be to look at the Outlook.Application registry key
and see which executable it points to, then use the file version API to read
the version info.

Dmitry Streblechenko (MVP)
http://www.dimastr.com/
OutlookSpy - Outlook, CDO
and MAPI Developer Tool

"Ken Slovak - [MVP - Outlook]" wrote in message
...
You can read the Path value from
HKLM\Software\Microsoft\Windows\CurrentVersion\App Paths\OUTLOOK.EXE and
see where Outlook is installed if it is and then go to that folder and
file and read the version property. A clue usually is the 11.0 in the path
for Outlook 2003 or 12.0 for Outlook 2007, etc. but the user can install
where they want so that's not always accurate.

--
Ken Slovak
[MVP - Outlook]
http://www.slovaktech.com
Author: Absolute Beginner's Guide to Microsoft Office Outlook 2003
Reminder Manager, Extended Reminders, Attachment Options
http://www.slovaktech.com/products.htm


"Tanweer Ahmad" wrote in message
...
Hi Experts,
I am developing an outlook plugin for office 2000,2003,2007. i want to
make a setup file which can check the installed office version and
install the relative PIA, before installing the addin.. how can i do
that?
Peace & Kind Regards,
Tanweer