title: VSTO Outlook 2007 unique message ID
body: <p>I am creating an Outlook 2007 add-in using VSTO.  I need to store information (entered by the user) about each email.  My first thought is to create a small "database" that references each email as necessary.  But I can't seem to find an accessible identifier for each email for this purpose.  Is there an ID or some other unique field that is available for each mail message item that I can use?</p>
  
  <p>C# or VB.NET code is fine.  Hopefully this can be some easy points for you!</p>
  
  <p>Thanks in Advance!</p>