PidTagAttachNumber Canonical Property
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Contains a number that uniquely identifies the attachment within its parent message.
Associated properties: |
PR_ATTACH_NUM |
Identifier: |
0x0E21 |
Data type: |
PT_LONG |
Area: |
Message attachment |
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.
Related Resources
Protocol Specifications
- [MS-OXCMSG]
Handles message and attachment objects.
Header Files
Mapidefs.h
Provides data type definitions.Mapitags.h
Contains definitions of properties listed as alternate names.