Windows 8 allows user to run metro style applications. In the Start screen, applications are arranged as titles instead of icons. The data on the tile could be set as "alive", which means it could be updated periodically to reflect current state of the data belongs to application. Data can either be pushed to the live tile or ask for update from the service.
When the Metro style application is started up, it would use one window which fills the entire screen to host views in various layout formats. It can interact with user via traditional ways such as mouse, keyboard, but also the intuitive ways such as touch and pen. Communications between metro style applications are allowed through contracts. Data would be shared among metro style applications having contracts.
Developers can develop applications or application components in programming languages such as C#, VB.Net, C++, C++Extension, HTML5, Java Script. Application components developed in one programming language can be used in application developed in other programming language, this interoperability will encourage developers to develop reuse the components and save the development time for other applications in the future.
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