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The Microsoft Outlook 2010 Messaging API (MAPI) Reference provides the messaging architecture for Microsoft Outlook 2010.

• MAPI for Outlook 2010 provides a set of interfaces, functions, and other data types to facilitate the development of Outlook 2010 messaging applications. Applications and transports use MAPI to manipulate e-mail data, to create e-mail messages and the folders to store them in, and to support notifications of changes to existing MAPI-related data.
  
  The Outlook 2010 MAPI Reference contains documentation for the following MAPI updates:
  • Support for 64-bit Outlook.
  • Fast shutdown support for MAPI clients.
  • A stream structure for field definitions for an Outlook item.
  • An additional 38 tagged properties and named properties.
  • The option to link explicitly to MAPI functions.

Files

Status: Deleted This download is no longer available on microsoft.com. The downloads below are archives provided by the Internet Archive Wayback Machine from the Microsoft Download Center prior to August 2020.

File	Size
Outlook2010MAPIRef.exe SHA1: 4d98580498befe8734a2f87331fc51e50bacfbdd	4.44 MB

• • This documentation download pertains to the following Microsoft Office applications:
    
    • Microsoft Office 2010
    • Microsoft Outlook 2010

• To install this download:
  
  1. Download the file by clicking the Download link and saving the file to your hard disk.
  2. Double-click the Outlook2010MAPIRef.exe program file on your hard disk to start the setup program.
  3. Follow the instructions on the screen to complete the installation.
  
  To remove this download:
  There is no removal feature for this download.
  
  Important: On computers that have security update 896358 installed, you cannot open Compiled Help Module (CHM) files that you download. For more information, see the following Microsoft Knowledge Base articles:
  
  • A vulnerability in HTML Help could allow remote code execution
  • You cannot open HTML Help files from Internet Explorer after you install security update 896358
  
  After you save the file locally, you can view its contents by using one of the following methods:
  
  
  1. Double-click the .chm file.
  2. In the Open File-Security Warning dialog box, clear the Always ask before opening this file check box.
  3. Click Open.
  - or -
  1. Right-click the .chm file, and then click Properties.
  2. Click Unblock.
  3. Double-click the .chm file to open it.