UnrealEngineUWP/Engine/Source/Programs/UnrealProjectTemplate/WizardAssembly/WizardControl.xaml

<UserControl x:Class="WizardAssembly.WizardControl"
             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" 
             mc:Ignorable="d" 
             d:DesignHeight="300" d:DesignWidth="300">
    <Grid>
		<WebBrowser Source="https://www.unrealengine.com/what-is-unreal-engine-4"></WebBrowser>
    </Grid>
</UserControl>