How to Place a transparent control on Videoscreen when mouse

Question

How to Place a transparent control on Videoscreen when mouse hovers in wpf xaml

 

My code is here:

 

<DockPanel LastChildFill="true" Grid.ColumnSpan="2" Grid.Row="1" Visibility="{Binding IsVideoDisplay,Mode=TwoWay,Converter={StaticResource BooleanToVisibilityConverter}}" >

<WindowsFormsHost x:Name="wfHost" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">

<winForms:Panel x:Name="VideoPanel" Dock="Fill"/>

<i:Interaction.Triggers>

<i:EventTrigger EventName="Loaded">

<i:InvokeCommandAction Command="{Binding ConferenceLoadedCommand}" CommandParameter="{Binding ElementName=VideoPanel}"/>

</i:EventTrigger>

</i:Interaction.Triggers>

</WindowsFormsHost>

</DockPanel >