Messaging Application Programming Interface definition messaging
(MAPI) A messaging architecture and a client
interface component for applications such as electronic mail
, scheduling, calendaring and document management. As a messaging architecture, MAPI provides a consistent interface for multiple application programs
to interact with multiple messaging systems across a variety of hardware platforms
MAPI provides better performance and control than Simple MAPI, Common Messaging Calls (CMC) or the Active Messaging Library. It has a comprehensive, open, dual-purpose interface, integrated with Microsoft Windows
. MAPI can be used by all levels and types of client application and "service providers" - driver-like components that provide a MAPI interface to a specific messaging system. For example, a word processor
can send documents and a workgroup
application can share and store different types of data using MAPI.
MAPI separates the programming interfaces used by the client applications and the service providers. Every component works with a common, Microsoft Windows
-based user interface. For example, a single messaging client application can be used to receive messages from fax
, a bulletin board
system, a host-based messaging system and a LAN
-based system. Messages from all of these systems can be delivered to a single "universal Inbox".
MAPI is aimed at the powerful, new market of workgroup applications that communicate with such different messaging systems as fax, DEC
All-In-1, voice mail
and public communications services such as AT&T
Easylink Services, CompuServe
MAIL. Because workgroup applications demand more of their messaging systems, MAPI offers much more than basic messaging in the programming interface and supports more than local area network
(LAN)-based messaging systems. Applications can, for example, format text for a single message with a variety of fonts and present to their users a customised view of messages that have been filtered, sorted or preprocessed.
MAPI is built into Windows 95
and Windows NT
and can be used by 16-bit and 32-bit Windows applications. The programming interface and subsystem contained in the MAPI DLL
provide objects which conform to the Component Object Model
. MAPI includes standard messaging client applications that demonstrate different levels of messaging support.
MAPI provides cross platform support through such industry standards as SMTP
and Common Messaging Calls. MAPI is the messaging component of Windows Open Services Architecture (WOSA).
[Correct expansion? Relatonship with Microsoft?]