AppointmentItem.BeforeAttachmentRead Event (Outlook)
Occurs before an attachment associated with an instance of the parent object is read from the file system, an attachment stream, or an Attachment object.
expression A variable that represents an AppointmentItem object.
|Attachment||Required||Attachment||The Attachment to be read.|
|Cancel||Required||Boolean||Set to True to cancel the operation; otherwise, set to False to allow the Attachment to be read.|