ScrollBar の標準テンプレート (の抜粋)

ScrollBar.template.xaml

<Grid x:Name="Bg"
      SnapsToDevicePixels="true">
    <Grid.ColumnDefinitions>
        <ColumnDefinition MaxWidth="{DynamicResource {x:Static SystemParameters.HorizontalScrollBarButtonWidthKey}}" />
        <ColumnDefinition Width="0.00001*" />
        <ColumnDefinition MaxWidth="{DynamicResource {x:Static SystemParameters.HorizontalScrollBarButtonWidthKey}}" />
    </Grid.ColumnDefinitions>
    <Border BorderBrush="{TemplateBinding BorderBrush}"
            BorderThickness="{TemplateBinding BorderThickness}"
            Background="{TemplateBinding Background}"
            Grid.Column="1" />
    <RepeatButton x:Name="PART_LineLeftButton"
                  Command="{x:Static ScrollBar.LineLeftCommand}"
                  IsEnabled="{TemplateBinding IsMouseOver}"
                  Style="{StaticResource ScrollBarButton}">
        <Path x:Name="ArrowLeft"
              Data="M 3.18,7 C3.18,7 5,7 5,7 5,7 1.81,3.5 1.81,3.5 1.81,3.5 5,0 5,0 5,0 3.18,0 3.18,0 3.18,0 0,3.5 0,3.5 0,3.5 3.18,7 3.18,7 z"
              Fill="{StaticResource ScrollBar.Static.Glyph}"
              Margin="3"
              Stretch="Uniform" />
    </RepeatButton>
    <Track x:Name="PART_Track"
           Grid.Column="1"
           IsEnabled="{TemplateBinding IsMouseOver}">
        <Track.DecreaseRepeatButton>
            <RepeatButton Command="{x:Static ScrollBar.PageLeftCommand}"
                          Style="{StaticResource RepeatButtonTransparent}" />
        </Track.DecreaseRepeatButton>
        <Track.IncreaseRepeatButton>
            <RepeatButton Command="{x:Static ScrollBar.PageRightCommand}"
                          Style="{StaticResource RepeatButtonTransparent}" />
        </Track.IncreaseRepeatButton>
        <Track.Thumb>
            <Thumb Style="{StaticResource ScrollBarThumbHorizontal}" />
        </Track.Thumb>
    </Track>
    <RepeatButton x:Name="PART_LineRightButton"
                  Grid.Column="2"
                  Command="{x:Static ScrollBar.LineRightCommand}"
                  IsEnabled="{TemplateBinding IsMouseOver}"
                  Style="{StaticResource ScrollBarButton}">
        <Path x:Name="ArrowRight"
              Data="M 1.81,7 C1.81,7 0,7 0,7 0,7 3.18,3.5 3.18,3.5 3.18,3.5 0,0 0,0 0,0 1.81,0 1.81,0 1.81,0 5,3.5 5,3.5 5,3.5 1.81,7 1.81,7 z"
              Fill="{StaticResource ScrollBar.Static.Glyph}"
              Margin="3"
              Stretch="Uniform" />
    </RepeatButton>
</Grid>