Available in the R3 2016 Release.

Please check our help article for more information:
http://docs.telerik.com/devtools/wpf/controls/radautocompletebox/features/key-properties#setting-noresultscontent-noresultscontenttemplate-properties

In Multiple SelectionMode it would be useful to be able to customize the way selected items (boxes) are displayed. Customizing their looks via a StyleSelector would be optimal.

The documentation for WPF FilteringBehavior.FindMatchingItems, <http://docs.telerik.com/devtools/wpf/api/html/M_Telerik_Windows_Controls_FilteringBehavior_FindMatchingItems.htm>, only tells the type of the parameters.  It does not tell what the parameters do, nor does it tell what the function does.

Add a possibility to set minimum populate delay to the control. It would be useful if a property like MinimumPopulateDelay is available to be set which would cause the populating of items to be delayed. Such feature would be helpful for cases when making requests to web server etc.

Currently the control does not select the item, if it is autocompleted and the focus is lost. We can add a property for this scenario similar to the CanAutocompleteSelectItems property of the RadComboBox.

Currently, when a RadAutoCompleteBox is placed in a ScrollViewer, the inner ScrollViewer of RadAutoCompleteBox prevents the parent one from scrolling via the mouse wheel.