With the new Windows Vista operating system comes a graphic subsystem with a vector-based framework called the "Windows Presentation Foundation" (WPF) for building user interfaces. Formerly known as Avalon, WPF combines control-based Windows and content-based web worlds. Written for developers, this covers an introduction to WPF, layout, controls, data binding, styles and control templates, resources, graphics, animation, custom controls and ClickOnce deployment, with extra information of XAML, inter-operability and asynchronous and multithreaded programming in WPF applications.