Property

Name
ScrollBackButtonToolTipText
ScrollForwardButtonToolTipText
Source

Example

<dev:HorizontalScrollContainer>
    <dev:HorizontalScrollContainer.Source>
        <StackPanel Orientation="Horizontal" Spacing="12">
            <!-- Items -->
        </StackPanel>
    <dev:HorizontalScrollContainer.Source>                              

<dev:HorizontalScrollContainer>

Demo

you can run demo and see this feature.