Obtaining OWA URL from Outlook

[Thomson Mui]

Is it possible to get the OWA URL of a mail item by using Outlook VBA?

For example, if there is a mail in my mailbox with subject "Test", the OWA
URL of this item will be something like:
http://ExchServer/Exchange/Thomson/inbox/Test.eml

The problem is that if there are more than one mail have the same subject,
the URL of the second mail will be http://....../inbox/Test-2.eml.

Is there a way to use Outlook VBA so that I will know the second item should
be Test-2.eml, not Test-3.eml, Test-4.eml etc?

Thanks,
Thomson