Xaml:
Code:
<UserControl  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"  
  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"  
  x:Class="CustomProgBar"  
  x:Name="UserControl" Width="370" Height="55" ClipToBounds="True">
  <UserControl.Resources>  
	<Storyboard x:Key="ProgressAnimationSB"     RepeatBehavior="Forever">  
		<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="GlowLayer" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.X)">  
		       <SplineDoubleKeyFrame KeyTime="00:00:00" Value="-395"/> 
		       <SplineDoubleKeyFrame KeyTime="00:00:02" Value="401"/>  
		</DoubleAnimationUsingKeyFrames>  
	</Storyboard>  
  </UserControl.Resources>  
  
  <UserControl.Triggers>  
	<EventTrigger RoutedEvent="FrameworkElement.Loaded">  
		<BeginStoryboard Storyboard="{StaticResource ProgressAnimationSB}"/>  
	</EventTrigger>  
  </UserControl.Triggers>  

  <Border Width="Auto" Height="Auto" ClipToBounds="True" BorderBrush="#FF000000" BorderThickness="1,1,1,1" CornerRadius="2,2,2,2">  
	<Border.Background>  
		<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">  
			<GradientStop Color="#FFFFFBFB" Offset="0"/>  
			<GradientStop Color="#FFC1C1C1" Offset="1"/>  
		</LinearGradientBrush>  </Border.Background>  
		
		<Rectangle Stroke="{x:Null}" RenderTransformOrigin="0.5,0.5" x:Name="GlowLayer" RadiusX="0" Margin="0,-17,0,0" ClipToBounds="True" Opacity="1" StrokeThickness="1" IsEnabled="True">  
			<Rectangle.RenderTransform>  
				<TransformGroup>  
					<ScaleTransform ScaleX="1" ScaleY="1"/>  
					<SkewTransform AngleX="0" AngleY="0"/>  
					<RotateTransform Angle="0"/>  
					<TranslateTransform X="0" Y="0"/>  
				</TransformGroup>  
			</Rectangle.RenderTransform>  

		<Rectangle.Fill>  
			<RadialGradientBrush GradientOrigin="0.503,0.563">  
				<RadialGradientBrush.RelativeTransform>  
					<TransformGroup>  
						<ScaleTransform CenterX="0.5" CenterY="0.5" ScaleX="1" ScaleY="1.695"/> 
						<SkewTransform AngleX="0" AngleY="0" CenterX="0.5" CenterY="0.5"/>  
						<RotateTransform Angle="0" CenterX="0.5" CenterY="0.5"/>  
						<TranslateTransform X="-0.001" Y="0.483"/>  
					</TransformGroup>  
				</RadialGradientBrush.RelativeTransform>  

				<GradientStop Color="#FF01CC0F" Offset="0"/>  
				<GradientStop Color="#00E2E2E2" Offset="0.996"/>  
			</RadialGradientBrush>  
		</Rectangle.Fill>  
	</Rectangle>  
  </Border> 
</UserControl>