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WinRTWindows Runtime (Microsoft software)
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Key differences remain between apps built with WinRT and apps built with the Windows API.
Win32 and WinRT apps are not as different as you might think.
Most significantly, Windows RT devices will not run existing Windows 7, Vista and XP applications, but rather only new ones created with the new Windows runtime WinRT APIs.
WinRT is the Metro equivalent of Win32, which is the API that Desktop apps use.
WinRT APIs will even be accessible to applications developed using frameworks such as .
The new designation is a nod to WinRT, for "Windows Runtime," the APIs (application programming interfaces) responsible for the Metro interface and its apps.
The key features are integrated into the product report designers for HTML 5 and WinRT.