Add-In to run continously in background

Hello,

     I am trying to write an Outlook (2010) add-in which needs to run a particular piece of C# code (or a method) at regular intervals (let's say every 1 hr).

Could some one please let me know how do I achieve this? I guess there should be something registered in 'ThisAddIn_Startup' method?

I tried looking at the various places but only seem to find illustrations of developing add-ins which trigger upon a particular action (creating a new email message, deleting an item etc..)