* 12 April 2010 - Microsoft Help Viewer 1.0 is RTM (Release to Manufacturing) as part of the Visual Studio 2010 release.
* 3 March 2011 - Microsoft Help Viewer 1.1 ships with Service Pack 1 of Visual Studio 2010.
==File Format==
Help file has a ".mshc" (Microsoft Help Content) file extension and is simply a standard [[ZIP_(file_format) | Zip file]] renamed. It contains no proprietary files, just the author's content files.
A compiler (Workshop) is not required. Instead help files are ripped ([[Index (search engine)|Index]]ed) at installation time.
Topics files are written in XHTML 1.x compatible HTML. Standard HTML [[Meta_tags | Meta Tags]] are used to define various topic attributes including the Table of Contents (TOC), Visible Index and F1 Keyword list.
