<Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="WPF" Height="120" Width="300"> <Window.Resources> <Style TargetType="{x:Type ProgressBar}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type ProgressBar}"> <Grid MinHeight="20" MinWidth="240"> <Rectangle Name="PART_Track" Fill="Gainsboro" Stroke="Gray" StrokeThickness="1" /> <Rectangle Name="PART_Indicator" Fill="DarkGray" Stroke="Gray" StrokeThickness="1" HorizontalAlignment="Left" /> </Grid> </ControlTemplate> </Setter.Value> </Setter> </Style> </Window.Resources> <StackPanel> <ProgressBar Width="200" Height="100" x:Name="progress" Value="30" HorizontalAlignment="Center" Margin="10"/> <Slider Value="{Binding ElementName=progress, Path=Value, Mode=TwoWay}" Minimum="0" Maximum="100" Margin="10"/> </StackPanel> </Window>