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.

Signature
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
> 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
Dmitry Streblechenko - 27 Jun 2007 17:48 GMT
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
> You can read the Path value from
> HKLM\Software\Microsoft\Windows\CurrentVersion\App Paths\OUTLOOK.EXE and
[quoted text clipped - 10 lines]
>> Peace & Kind Regards,
>> Tanweer