Cannot open file 'Interop.Outlook.dll' as a PE file

Hello,

I am trying rebuild the 'Interop.Outlook.dll' file as suggested in the
following MSDN article:

http://support.microsoft.com/default...;en-us;Q309336

When I run the following from the command line:

ildasm.exe /source Interop.Outlook.dll /output=Interop.Outlook.il

I received the following error message:

error: Cannot open file 'Interop.Outlook.dll' as a PE file

Since it will probably be required in order to build a solution that traps
application events across multiple versions of Outlook, what shall I do?

Has anyone else experienced this?

Regards,

TC