Windows Presentation Framework 4.0 (WPF 4) has increased support for touch. Some of the new classes introduced in WPF 4 include TouchDevice and TouchPoint. Also, the UIElement implementation in WPF4 now supports manipulations. The Microsoft Surface 2.0 SDK is consistent with the WPF 4 classes, so the Surface 2.0 APIs changed slightly from the Surface 1.0 APIs—primarily to keep consistent with WPF 4.
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