>Hi,
>
>I want to be able to transfer single e-mails from MS Outlook to a VFP app by clicking a button on a toolbar hosted in Outlook. The click should fire code for automating VFP from Outlook.
>
>Does anyone know how to build, register and load the toolbar from VFP?

http://www.tedroche.com/Present/2003/OutlookAutomation.html

Take a look at "Outlook driving" section of this article for an example.