If you haven't checked this out yet, it is worth looking at.

Nathan Carlson, a developer on my team, created a VSTO Outlook Add-in that can read your mail using voice synthesis and also responds to voice commands.

You can download the source code here.

The sample demonstrates:

  • Basics of developing an Outlook 2007 Add-in.
  • Consuming Outlook events.
  • Accessing e-mails.
  • Creating a Custom Action for Outlook rules.
  • Using Speech Synthesis.
  • Using Speech Recognition.

I had never known about the ability to create a custom action that could be used in Outlook rules--so it is worth checking out just to see how he does that.