Avalonia/samples/IntegrationTestApp/Pages/PointerPage.axaml

<UserControl xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
             x:Class="IntegrationTestApp.Pages.PointerPage">
  <StackPanel>
    <!-- Trigger with PointerPressed rather using a Button so we have access to the pointer. -->
    <Border Name="PointerPageShowDialog"
            Background="{DynamicResource ButtonBackground}"
            HorizontalAlignment="Left"
            Padding="{DynamicResource ButtonPadding}"
            AutomationProperties.AccessibilityView="Control"
            PointerPressed="PointerPageShowDialog_PointerPressed">
      <TextBlock>Show Dialog</TextBlock>
    </Border>
    <TextBlock Name="PointerCaptureStatus"/>
  </StackPanel>
</UserControl>