Data type: PtypInteger32 ([MS-OXCDATA] section 2.11.1)
The PidTagDisplayType property ([MS-OXPROPS] section 2.670) contains a value that indicates how to display an Address Book object in a table or as an addressee on a message. Messaging clients use this property to display an icon, make the object bold, or apply some other display element to make it easy for a user who is viewing the object to distinguish its type. In addition, the PidTagDisplayTypeEx property (section 22.214.171.124) provides a means to refine the display further.
The PidTagDisplayType property MUST have one of the following display type values, as specified in [MS-NSPI] and [MS-OXNSPI] section 2.2.3, according to the object's type: DT_MAILUSER, DT_DISTLIST, DT_FORUM, DT_AGENT, DT_ORGANIZATION, DT_PRIVATE_DISTLIST, or DT_REMOTE_MAILUSER.<13>