Similar to the UWP AutoCompleteBox functionality - http://docs.telerik.com/windows-universal/controls/radautocompletebox/features/autocompletebox-webservice-support
I have updated the status of this item to "Declined" as it concerns the obsolete AutoComplete control. The functionality can be achieved with the new RadAutoCompleteView control, for detailed information go to the AutoCompleteView: Remote Search topic.
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