StatusBarItem objects are used to define items in a StatusBar control.
<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid>
<StatusBar Name="sbar"
VerticalAlignment="Bottom" >
<StatusBar.Background>
<LinearGradientBrush EndPoint="0.5,1"
StartPoint="0.5,0">
<GradientStop Color="Black" Offset="0"/>
<GradientStop Color="#FFAE1B1B" Offset="1"/>
</LinearGradientBrush>
</StatusBar.Background>
<StatusBarItem>
<TextBlock Foreground="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}">Processsing</TextBlock>
</StatusBarItem>
<StatusBarItem>
<ProgressBar Width="100" Height="20"
Name="progressBar1">
<ProgressBar.Triggers>
<EventTrigger RoutedEvent="ProgressBar.Loaded">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation
Storyboard.TargetName="progressBar1"
Storyboard.TargetProperty="Value"
From="0" To="100" Duration="0:0:5" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</ProgressBar.Triggers>
</ProgressBar>
</StatusBarItem>
<Separator/>
<StatusBarItem>
<TextBlock Foreground="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}">Percent</TextBlock>
</StatusBarItem>
</StatusBar>
</Grid>
</Window>