Apple Style Scroll bar in WPF

I am working on a WPF application recently, created a Apple style scrollbar.
Here is the code, hope it will be useful. This version had been tailored to meet my requirement.  after apply it to a listbox, it looks like the following.

Also there is very good article  http://www.codeproject.com/Articles/37366/Styling-A-ScrollViewer-Scrollbar-In-WPF explain the structure of Scrollbar and how to change it.

1:  <SolidColorBrush x:Key="ScrollBarDisabledBackground" Color="#F4F4F4"/>  
2:      <Style x:Key="VerticalScrollBarPageButton" TargetType="{x:Type RepeatButton}">  
3:        <Setter Property="OverridesDefaultStyle" Value="true"/>  
4:        <Setter Property="Background" Value="Transparent"/>  
5:        <Setter Property="Focusable" Value="false"/>  
6:        <Setter Property="IsTabStop" Value="false"/>  
7:        <Setter Property="Template">  
8:          <Setter.Value>  
9:            <ControlTemplate TargetType="{x:Type RepeatButton}">  
10:              <Rectangle Fill="{TemplateBinding Background}" Height="{TemplateBinding Height}" Width="{TemplateBinding Width}"/>  
11:            </ControlTemplate>  
12:          </Setter.Value>  
13:        </Setter>  
14:      </Style>  
15:      <Style x:Key="ScrollBarThumb" TargetType="{x:Type Thumb}">  
16:        <Setter Property="OverridesDefaultStyle" Value="true"/>  
17:        <Setter Property="IsTabStop" Value="false"/>  
18:        <Setter Property="Template">  
19:          <Setter.Value>  
20:            <ControlTemplate TargetType="{x:Type Thumb}">  
21:              <Border Background="#FF868686" BorderThickness="0,0,1,0" Height="Auto" CornerRadius="4" />  
22:            </ControlTemplate>  
23:          </Setter.Value>  
24:        </Setter>  
25:      </Style>  
26:      <Style x:Key="HorizontalScrollStyle" TargetType="{x:Type ScrollBar}">  
27:        <Setter Property="Background" Value="Transparent"/>  
28:        <Setter Property="Template">  
29:          <Setter.Value>  
30:            <ControlTemplate TargetType="{x:Type ScrollBar}">  
31:              <Grid x:Name="Bg" Background="{TemplateBinding Background}" Height="10" SnapsToDevicePixels="true">  
32:                <Grid.RowDefinitions>  
33:                  <RowDefinition />  
34:                </Grid.RowDefinitions>  
35:                <Track x:Name="PART_Track" IsDirectionReversed="true" IsEnabled="{TemplateBinding IsMouseOver}">  
36:                  <Track.DecreaseRepeatButton>  
37:                    <RepeatButton Command="{x:Static ScrollBar.PageUpCommand}" Style="{StaticResource VerticalScrollBarPageButton}"/>  
38:                  </Track.DecreaseRepeatButton>  
39:                  <Track.IncreaseRepeatButton>  
40:                    <RepeatButton Command="{x:Static ScrollBar.PageDownCommand}" Style="{StaticResource VerticalScrollBarPageButton}"/>  
41:                  </Track.IncreaseRepeatButton>  
42:                  <Track.Thumb>  
43:                    <Thumb Style="{StaticResource ScrollBarThumb}" Cursor="Hand"/>  
44:                  </Track.Thumb>  
45:                </Track>  
46:              </Grid>  
47:              <ControlTemplate.Triggers>  
48:                <Trigger Property="IsEnabled" Value="false">  
49:                  <Setter Property="Background" TargetName="Bg" Value="{StaticResource ScrollBarDisabledBackground}"/>  
50:                </Trigger>  
51:              </ControlTemplate.Triggers>  
52:            </ControlTemplate>  
53:          </Setter.Value>  
54:        </Setter>  
55:      </Style>  
56:      <Style x:Key="AppleStyleVerticalScrollBarStyle" TargetType="{x:Type ScrollBar}">  
57:        <Setter Property="Template">  
58:          <Setter.Value>  
59:            <ControlTemplate TargetType="{x:Type ScrollBar}">  
60:              <Grid x:Name="Bg" SnapsToDevicePixels="true" Width="10" HorizontalAlignment="Right" Margin="0">  
61:                <Grid.RowDefinitions>  
62:                  <RowDefinition />  
63:                </Grid.RowDefinitions>  
64:                <Track x:Name="PART_Track" IsDirectionReversed="true" IsEnabled="{TemplateBinding IsMouseOver}">  
65:                  <Track.DecreaseRepeatButton>  
66:                    <RepeatButton Command="{x:Static ScrollBar.PageUpCommand}" Style="{StaticResource VerticalScrollBarPageButton}" />  
67:                  </Track.DecreaseRepeatButton>  
68:                  <Track.IncreaseRepeatButton>  
69:                    <RepeatButton Command="{x:Static ScrollBar.PageDownCommand}" Style="{StaticResource VerticalScrollBarPageButton}"/>  
70:                  </Track.IncreaseRepeatButton>  
71:                  <Track.Thumb>  
72:                    <Thumb Style="{DynamicResource ScrollBarThumb}" Cursor="Hand"/>  
73:                  </Track.Thumb>  
74:                </Track>  
75:              </Grid>  
76:            </ControlTemplate>  
77:          </Setter.Value>  
78:        </Setter>  
79:      </Style>  
80:      <ControlTemplate x:Key="AppleStyleScrollBarStyle" TargetType="{x:Type ScrollViewer}">  
81:        <Grid x:Name="Grid" Background="{TemplateBinding Background}">  
82:          <Grid.ColumnDefinitions>  
83:            <ColumnDefinition Width="*"/>  
84:            <ColumnDefinition Width="Auto"/>  
85:          </Grid.ColumnDefinitions>  
86:          <Grid.RowDefinitions>  
87:            <RowDefinition Height="*"/>  
88:            <RowDefinition Height="Auto"/>  
89:          </Grid.RowDefinitions>  
90:          <Rectangle x:Name="Corner" Grid.Column="1" Fill="{x:Null}" Grid.Row="1"/>  
91:          <ScrollContentPresenter x:Name="PART_ScrollContentPresenter" CanContentScroll="{TemplateBinding CanContentScroll}"   
92:                      CanHorizontallyScroll="False" CanVerticallyScroll="False"   
93:                      ContentTemplate="{TemplateBinding ContentTemplate}"   
94:                      Content="{TemplateBinding Content}" Grid.Column="0"   
95:                      Margin="{TemplateBinding Padding}" Grid.Row="0"/>  
96:          <ScrollBar x:Name="PART_VerticalScrollBar" Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}"   
97:              AutomationProperties.AutomationId="VerticalScrollBar" Cursor="Arrow" Grid.Column="1"   
98:              Maximum="{TemplateBinding ScrollableHeight}" Minimum="0" Grid.Row="0"   
99:              Value="{Binding VerticalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}"   
100:              ViewportSize="{TemplateBinding ViewportHeight}" Style="{DynamicResource AppleStyleVerticalScrollBarStyle}"   
101:                Background="{x:Null}" Width="Auto" Margin="0"/>  
102:          <ScrollBar x:Name="PART_HorizontalScrollBar" Visibility="{TemplateBinding ComputedHorizontalScrollBarVisibility}"   
103:              AutomationProperties.AutomationId="HorizontalScrollBar" Cursor="Arrow" Grid.Column="0"   
104:              Maximum="{TemplateBinding ScrollableWidth}" Minimum="0" Orientation="Horizontal" Grid.Row="1"   
105:              Value="{Binding HorizontalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}"   
106:              ViewportSize="{TemplateBinding ViewportWidth}" Style="{DynamicResource HorizontalScrollStyle}"/>  
107:        </Grid>  
108:      </ControlTemplate>