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applications programming interface
(foldoc) | Application Program Interface
API
Application Programming Interface
Applications Programming Interface
(API, or "application programming interface")
The interface (calling conventions) by which an {application
program} accesses operating system and other services. An
API is defined at source code level and provides a level of
abstraction between the application and the kernel (or
other privileged utilities) to ensure the portability of the
code.
An API can also provide an interface between a {high level
language} and lower level utilities and services which were
written without consideration for the calling conventions
supported by compiled languages. In this case, the API's main
task may be the translation of parameter lists from one format
to another and the interpretation of call-by-value and
call-by-reference arguments in one or both directions.
(1995-02-15)
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messaging applications programming interface
(foldoc) | Messaging Application Programming Interface
Mail Application Programming Interface
MAPI
Messaging Applications Programming Interface
Microsoft Mail Application Program Interface
(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 and MCI 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, X.400 and Common Messaging Calls. MAPI
is the messaging component of {Windows Open Services
Architecture} (WOSA).
[Correct expansion? Relatonship with Microsoft?]
(1997-12-03)
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