<Style x:Key="{x:Type CheckBox}" TargetType="CheckBox">
  <Setter Property="SnapsToDevicePixels" Value="true"/>
  <Setter Property="OverridesDefaultStyle" Value="true"/>
  <Setter Property="FocusVisualStyle"    Value="{StaticResource CheckBoxFocusVisual}"/>
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="CheckBox">
        <BulletDecorator Background="Transparent">
          <BulletDecorator.Bullet>
            <Border x:Name="Border"  
              Width="13" 
              Height="13" 
              CornerRadius="0" 
              Background="{StaticResource NormalBrush}"
              BorderThickness="1"
              BorderBrush="{StaticResource NormalBorderBrush}">
              <Path 
                Width="7" Height="7" 
                x:Name="CheckMark"
                SnapsToDevicePixels="False" 
                Stroke="{StaticResource GlyphBrush}"
                StrokeThickness="2"
                Data="M 0 0 L 7 7 M 0 7 L 7 0" />
            </Border>
          </BulletDecorator.Bullet>
          <ContentPresenter Margin="4,0,0,0"
            VerticalAlignment="Center"
            HorizontalAlignment="Left"
            RecognizesAccessKey="True"/>
        </BulletDecorator>
        <ControlTemplate.Triggers>
          <Trigger Property="IsChecked" Value="false">
            <Setter TargetName="CheckMark" Property="Visibility" Value="Collapsed"/>
          </Trigger>
          <Trigger Property="IsChecked" Value="{x:Null}">
            <Setter TargetName="CheckMark" Property="Data" Value="M 0 7 L 7 0" />
          </Trigger>
          <Trigger Property="IsMouseOver" Value="true">
            <Setter TargetName="Border" Property="Background" Value="{StaticResource DarkBrush}" />
          </Trigger>
          <Trigger Property="IsPressed" Value="true">
            <Setter TargetName="Border" Property="Background" Value="{StaticResource PressedBrush}" />
            <Setter TargetName="Border" Property="BorderBrush" Value="{StaticResource PressedBorderBrush}" />
          </Trigger>
          <Trigger Property="IsEnabled" Value="false">
            <Setter TargetName="Border" Property="Background" Value="{StaticResource DisabledBackgroundBrush}" />
            <Setter TargetName="Border" Property="BorderBrush" Value="{StaticResource DisabledBorderBrush}" />
            <Setter Property="Foreground" Value="{StaticResource DisabledForegroundBrush}"/>
          </Trigger>
        </ControlTemplate.Triggers>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>