In the official release of MSDN Chinese portals on MSDN Chinese portals in March 31, 2004, everyone is very interested in the files for MSPX suffixes. Today, I finally saw the detailed explanation of authority, which updated on May 3, 2004, Microsoft.com, the article: Developing a Worldwide UI Framework.
MSPX is a component of this user interface framework, specifically:
The presentation framework includes a custom Web handler built in ASP.NET. Pages that use the presentation framework have the .mspx filename extension, which is registered in Microsoft Internet Information Services (IIS) on the Web servers. When one of the Microsoft.com Web Servers Receives A Request for An .MSPX Page, this Custom Web Handler Intercepts That Call and Passs It to Framework for Processing.
