message.
Remarks: | Message stores generate and maintain this property. The attachment number
is the secondary sort key, after the rendering position, in the attachment
table.
PR_ATTACH_NUM is used to open the attachment with the IMessage::OpenAttach
method. Within a client application's session, the PR_ATTACH_NUM property
of a message attachment remains constant as long as the attachment table is
open.
The message store propagates changes to the table using the
Imessage::CreateAttach and Imessage::DeleteAttach methods. At its option
the message store can generate table notifications on open attachment
tables so that clients can resynchronize to those changes. |