On the left part of the linked demos site you can find a set of sample applications implemented with our controls, the source code for which is available for download in each one of them. You can see them listed here (on the right part of the page).
The source code for the whole demo application is available for download through your Telerik account.
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Do you want to know when a feature you care about is added or when a bug fixed?
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and vote to affect the priority of the items