I prefer to use MAPI as it works with several email clients.
However with Outlook 2002, when reading the attachment I get a truncated AttachmentName and AttachmentPathName. For example:

When the real attachment name is: MyLongFileName.doc

loMessage.AttachmentName = "MyLongfl.doc"
loMessage.AttachmentPathName = "C:\DOCUME~1\admin\LOCALS~1\Temp\MyLongfl.doc"

How can I read the real Attachment file name?