Kepler-Release/Venus/Framework/UICore/DeviceControl/AITSensor.xaml

<UserControl x:Class="Aitex.Core.UI.DeviceControl.AITSensor"
             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="20" d:DesignWidth="20">
    <Grid MouseEnter="Grid_MouseEnter" >
        <Ellipse  HorizontalAlignment="Center" VerticalAlignment="Center"  Stroke="Gray" StrokeThickness="2"  Width="15" Height="15"    
                       Fill="DarkGray" x:Name="sensor"  Style="{x:Null}"/>
    </Grid>
</UserControl>