or

<Window x:Class="RadDockingTests.MainWindow" xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" Title="MainWindow" Height="350" Width="525"> <Window.Resources> <Style x:Key="CustomScrollViewerStyle" TargetType="ScrollViewer"> <Setter Property="VerticalScrollBarVisibility" Value="Disabled"/> <Style.Triggers> <Trigger Property="IsMouseOver" Value="True"> <Setter Property="HorizontalScrollBarVisibility" Value="Auto"/> </Trigger> <Trigger Property="IsMouseOver" Value="False"> <Setter Property="HorizontalScrollBarVisibility" Value="Hidden"/> </Trigger> </Style.Triggers> </Style> </Window.Resources> <Grid> <telerik:RadDocking Name="radDocking"> <telerik:RadDocking.DocumentHost> <telerik:RadSplitContainer Orientation="Vertical"> <telerik:RadPaneGroup Name="radPaneGroup"> <telerik:RadPane Header="Pane One"> <telerik:RadPane.Content> <ScrollViewer Style="{StaticResource CustomScrollViewerStyle}"> <StackPanel Orientation="Horizontal"> <Button Content="This is some filler content."/> <Button Content="This is some filler content."/> <Button Content="This is some filler content."/> <Button Content="This is some filler content."/> <Button Content="This is some filler content."/> <Button Content="This is some filler content."/> <Button Content="This is some filler content."/> <Button Content="This is some filler content."/> </StackPanel> </ScrollViewer> </telerik:RadPane.Content> </telerik:RadPane> </telerik:RadPaneGroup> <telerik:RadPaneGroup> <telerik:RadPane Header="Pane Two"> <telerik:RadPane.Content> <ScrollViewer Style="{StaticResource CustomScrollViewerStyle}"> <StackPanel Orientation="Horizontal"> <Button Content="This is some filler content."/> <Button Content="This is some filler content."/> <Button Content="This is some filler content."/> <Button Content="This is some filler content."/> <Button Content="This is some filler content."/> <Button Content="This is some filler content."/> <Button Content="This is some filler content."/> <Button Content="This is some filler content."/> </StackPanel> </ScrollViewer> </telerik:RadPane.Content> </telerik:RadPane> </telerik:RadPaneGroup> </telerik:RadSplitContainer> </telerik:RadDocking.DocumentHost> </telerik:RadDocking> </Grid></Window>