Implementing Messages in Message Stores

The IMessage interface is similar to the IMAPIFolder interface in that both interfaces derive from the IMAPIProp interface. Clients use the IMAPIProp methods to access the contents of a message. The IMessage interface supplies additional methods for manipulating messages, such as for adding attachments or modifying the recipients of a message. The methods in the IMessage interface serve to modify attributes of messages that are not stored directly in the message's properties.