Mapi Objects in Access (1 Viewer)

[rock]

I have a bit of code that i need to implement, but it has a few Mapi calls in it. I don't know which reference i need for my app to access it. Here is a snipit of code:
Dim objSession As MAPI.Session
Dim objMessage As MAPI.Message
Dim objRecipient As MAPI.Recipient
Dim AttachDoc As MAPI.Attachment
Has anyone used this before?
thanks,
rock