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PidTagContentUnreadCount Canonical Property

Last modified: July 23, 2011

Applies to: Outlook

Contains the number of unread messages in a folder, as computed by the message store.

Associated properties:

PR_CONTENT_UNREAD

Identifier:

0x3603

Data type:

PT_LONG

Area:

Folder

This property computed by the message store is used for two different, though related, purposes. On a MAPI folder object, it contains the number of messages in a folder. In a heading row in categorized MAPI tables, it contains the number of unread non-associated messages in the category corresponding to that heading row.

This property contains the number of messages in the folder contents table for which the MSGFLAG_READ flag is not set in the PR_MESSAGE_FLAGS (PidTagMessageFlags) property. The PR_CONTENT_COUNT (PidTagContentCount) property contains the total message count for the folder. The PR_CONTENT_COUNT and this property are read-only to clients.

Some client applications display the heading row of a category differently depending on the value of this property. For example, a client can display a category that includes unread messages in bold. This property cannot be used as a category and an attempt to do so results in the MAPI_E_INVALID_PARAMETER value being returned from the IMAPITable::SortTable method.

Protocol Specifications

[MS-OXPROPS]

Provides references to related Exchange Server protocol specifications.

[MS-OXCFOLD]

Handles folder operations.

[MS-OXCTABL]

Includes permissible operations for the core table objects.

Header Files

Mapidefs.h

Provides data type definitions.

Mapitags.h

Contains definitions of properties listed as alternate names.

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