PidTagAttachNumber Canonical Property

  • Articolo

Applies to: Office 2010 | Outlook 2010 | Visual Studio

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.

Protocol Specifications

Header Files

  • Mapidefs.h
    Provides data type definitions.

  • Mapitags.h
    Contains definitions of properties listed as alternate names.

See Also

Concepts

MAPI Properties

MAPI Canonical Properties

Mapping Canonical Property Names to MAPI Names

Mapping MAPI Names to Canonical Property Names