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