Microsoft Expression Web, code-named Quartz, is an HTML editor and general web design program by Microsoft. It is part of the Expression Studio suite. It is not considered by Microsoft to be a WYSIWYG editor[1], nor is it touted as such. The EW community FAQ describes EW as an HTML editor that is designed to make quality, standards-compliant websites that display properly on all browsers. Expression Web can design and develop web pages using XML, CSS 2.1, ASP.NET or ASP.NET AJAX, XHTML, XSLT, PHP and javascript. EW4 requires the .NET Framework 4.0 and Silverlight 4.0 to install and run.[2]. Microsoft SharePoint Designer provides related Microsoft technology. It offers Visual Studio support for ASP.NET applications. It has some legacy support for classic ASP. Expression Web uses its own standards-based rendering engine which is different from Internet Explorer s Trident engine. Microsoft Expression Web provides the ability to install add-ons from third-party developers, extending its capabilities.