kmpdfkit_demo/Demo/Examples/ComPDFKit.Tool/CPDFViewerTool.xaml

<UserControl x:Class="ComPDFKit.Tool.CPDFViewerTool"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:ComPDFKit.Tool" 
             xmlns:compdfkitviewer="clr-namespace:ComPDFKitViewer;assembly=ComPDFKit.Viewer"
             mc:Ignorable="d" 
             Focusable="True"
             Loaded="CPDFViewerTool_Loaded"
             Unloaded="CPDFViewerTool_Unloaded"
             >
    <ScrollViewer Focusable="False" CanContentScroll="True"
                  HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto"
                  MouseUp="ScrollViewer_MouseUp" MouseDown="ScrollViewer_MouseDown" ScrollChanged="ScrollViewer_ScrollChanged">
        <compdfkitviewer:CPDFViewer x:Name="PDFViewer"></compdfkitviewer:CPDFViewer>
    </ScrollViewer>
</UserControl>