Windows Live Mail 2011 API - integration framework for Windows Live Mail 2011.
The framework allows writing Windows Live Mail plugins using Visual C++, C#, VB and VB.Net, Delphi. This version allows customizing Windows Live Mail 2011 ribbon toolbar, accessing accounts, message folders, emails, Windows Live Mail contacts. Live Mail API works directly with DirectUI to allow user interface modifications, adding new buttons, images, etc.
To get started read Quick HOWTO or browse Windows Live Mail API online documentation.
The plugin development framework supports Windows Live Mail 2011. If you interesting in Windows Live Mail for Windows XP take a look on Windows Live Mail XP page.