Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All
Expand Minimize
Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here.

PidTagAttachAdditionalInformation Canonical Property

This content is outdated and is no longer being maintained. It is provided as a courtesy for individuals who are still using these technologies. This page may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist.

Provides file type information for a non-Windows attachment.

Associated properties:




Data type:



Message attachment

This property provides metadata about a particular attachment based on the attachment's encoding. For example, when the PR_ATTACH_ENCODING (PidTagAttachEncoding) property contains MacBinary, PR_ATTACH_ADDITIONAL_INFO contains a string that represents the Macintosh file creator and file type, formatted as ":CREA:TYPE" for the encoded Macintosh file.

Protocol Specifications


Handles message and attachment objects.

Header Files


Provides data type definitions.


Contains definitions of properties listed as alternate names.

© 2015 Microsoft