Now is the time to get acquainted with Native Extensions for Microsoft Silverlight (NESL) ,a new and evolving toolkit that enables Silverlight 4 out-of-browser applications to interact deeply with Windows 7 and leverage it in your Silverlight + Windows 7 customer scenarios.
The toolkit contains a runtime and Silverlight libraries that work together to allow Silverlight developers access to cool Windows 7 features like sensors, speech recognition, portable devices, Windows 7 taskbar etc. from within your applications.
NESL also contains full API documentation, working samples illustrating usage, and is delivered with full source for the sample applications and the Silverlight libraries.
Bruce D. Kyle
ISV Architect Evangelist | Microsoft Corporation