[1] An open source "convertlit" tool can be used to decompile the hxs file.
This format was originally intended only for the help system used by Visual Studio .NET 2002 help, MSDN Library and TechNet, but now it is used in Office 2007, Office 2010 and some IDEs, such as Borland Developer Studio.
An Assistance Platform (AP) help format based on a new XML-based markup language called Microsoft Assistance Markup Language was originally part of the Longhorn project.
It introduced a "guided help" (active content wizard, ACW) feature that highlights what parts of the screen to interact with.
Microsoft eventually decided against including ACW in Windows Vista.