Telerik UI for Windows Phone by Progress

RadAutoCompleteBox exposes the PopupStyle property which can be used to modify the look and feel of the popup in which filtered suggestions are populated.

Using the PopupStyle property

The PopupStyle property defines the the look and feel of the popup in which filtered suggestions are populated.

To set the PopupStyle property, first you will have to add a reference to the Telerik.Windows.Controls.AutoCompleteTextBox namespace.

CopyXAML
xmlns:autoComplete="clr-namespace:Telerik.Windows.Controls.AutoCompleteTextBox;assembly=Telerik.Windows.Controls.Input"

The code below demonstrates how to change the background of the suggestions popup.

CopyXAML
<telerikInput:RadAutoCompleteBox x:Name="radAutoCompleteBox">
    <telerikInput:RadAutoCompleteBox.PopupStyle>
        <Style TargetType="autoComplete:AutoCompleteItemsControl">
            <Setter Property="Background" Value="LightCoral" />
        </Style>
    </telerikInput:RadAutoCompleteBox.PopupStyle>
</telerikInput:RadAutoCompleteBox>