The Windows Live Messenger Library is a client-side library for building Web-based applications that integrate with Windows Live™ Messenger. With the Windows Live Messenger Library, developers can build presence-enabled instant messaging applications that Web site visitors can use to interact with each other and Windows Live Messenger client users.

The Windows Live Messenger Library is written in C# and compiled into JavaScript using Script#. Messenger Library applications can be written either in C# (with Script#) or JavaScript.

The Messenger Library can be used by Web sites hosted in any domain and works by using cross-site API calls to the Windows Live Messenger service. Registration with Microsoft is not required to use the Windows Live Messenger Library for development purposes.

New Features

• Sorted contact collections
• Contact display picture links
• Customization for the Sign-In Control
• A new URL for loading the library
• Hosted static images for status icons and Messenger logos
• URL strings for Messenger resources
• Sign-In Control returns extended authentication results

Download Windows Live Messenger Library 2.0

• Getting Started with the Windows Live Messenger Library
• What’s New in the Windows Live Messenger Library
• Windows Live Messenger Library Tutorial
• Developing with the Messenger Library
• Windows Live Messenger Library Application Design Guidelines
• Windows Live Messenger Library Reference