How: Preview Outlook2007

Hi,

i try to show a attachments from a e-mail in Outlook.

I can use a TaskPane, but that not works in a E-Mail how Word or Excel. 

I have file's with my extension and i want write a code for my Application

and show this in Outlook2007.

I must use XP und can' t use a Previehandle from Vista.

Thanks for idea.

greetings from berlin

Asim