How to I stop Vista from pulsating my focused XAML buttons?

Question

I've created a style for buttons in my WPF application.

However, on Vista, when a button is focused, it pulsates with a light blue that doesn't look good in the design.

How can I override this automatic pulsating?

<Style x:Key="NavigationButtonStyle" TargetType="Button">
    <Setter Property="Width" Value="400"/>
    <Setter Property="Height" Value="100"/>
    <Setter Property="Cursor" Value="Hand"/>
    <Setter Property="FontSize" Value="56"/>
    <Setter Property="Foreground" Value="#aaa"/>
    <Style.Triggers>
        <Trigger Property="IsEnabled" Value="False">
            <Setter Property="Foreground" Value="#ddd" />
        </Trigger>
        <Trigger Property="IsEnabled" Value="True">
            <Setter Property="Foreground" Value="#aaa" />
        </Trigger>
    </Style.Triggers>
</Style>

Tried "IsFocused":

Adding this doesn't have any effect on Vista, the button still looks the same and is pulsating in Vista when focused:

<Trigger Property="IsFocused" Value="True">
    <Setter Property="Background" Value="Red" />
    <Setter Property="Foreground" Value="Blue" />
</Trigger>

Tried "ControlTemplate" solution:

Still no effect:

<Style x:Key="ButtonFocusVisual">
    <Setter Property="Control.Template">
        <Setter.Value>
            <ControlTemplate>
                <Rectangle SnapsToDevicePixels="true" Margin="2" Stroke="Black" StrokeDashArray="1 2" StrokeThickness="1"/>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>
<Style x:Key="NavigationButtonStyle" TargetType="Button">
    <Setter Property="Width" Value="400"/>
    <Setter Property="Height" Value="100"/>
    <Setter Property="Cursor" Value="Hand"/>
    <Setter Property="FontSize" Value="56"/>
    <Setter Property="Foreground" Value="#aaa"/>
    <Setter Property="FocusVisualStyle" Value="{StaticResource ButtonFocusVisual}"/>
    <Style.Triggers>
        <Trigger Property="IsEnabled" Value="False">
            <Setter Property="Foreground" Value="#ddd" />
        </Trigger>
        <Trigger Property="IsEnabled" Value="True">
            <Setter Property="Foreground" Value="#aaa" />
        </Trigger>
    </Style.Triggers>
</Style>

Answer 1

What you are looking for is the IsFocused trigger property. Sorry that I do not have a working example for you right here.

---

UPDATE:

I found this small piece of code that I once used. I am not sure if is works and I can not test it (I am on an XP box):

<Style x:Key="ButtonFocusVisual">
    <Setter Property="Control.Template">
        <Setter.Value>
            <ControlTemplate>
                <Rectangle SnapsToDevicePixels="true" Margin="2" Stroke="Black" StrokeDashArray="1 2" StrokeThickness="1"/>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

<Style TargetType="{x:Type Button}">
    <Setter Property="FocusVisualStyle" Value="{StaticResource ButtonFocusVisual}"/>
</Style>

Answer 2

This effect is being set in response IsKeyboardFocused, not just standard focus.

In Blend if you edit the control template for a standard button, you'll see that on the IsKeyboardFocused=true trigger is responsible for this effect.

<Style x:Key="Button_NonGlow" TargetType="{x:Type Button}">
  <Setter Property="FocusVisualStyle" Value="{StaticResource ButtonFocusVisual}"/>
  <Setter Property="Background" Value="{StaticResource ButtonNormalBackground}"/>
  <Setter Property="BorderBrush" Value="{StaticResource ButtonNormalBorder}"/>
  <Setter Property="BorderThickness" Value="1"/>
  <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
  <Setter Property="HorizontalContentAlignment" Value="Center"/>
  <Setter Property="VerticalContentAlignment" Value="Center"/>
  <Setter Property="Padding" Value="1"/>
  <Setter Property="Template">
   <Setter.Value>
    <ControlTemplate TargetType="{x:Type Button}">
     <Microsoft_Windows_Themes:ButtonChrome SnapsToDevicePixels="true" x:Name="Chrome" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" RenderDefaulted="{TemplateBinding IsDefaulted}" RenderMouseOver="{TemplateBinding IsMouseOver}" RenderPressed="{TemplateBinding IsPressed}">
      <ContentPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" RecognizesAccessKey="True"/>
     </Microsoft_Windows_Themes:ButtonChrome>
     <ControlTemplate.Triggers>
      <Trigger Property="IsKeyboardFocused" Value="true">
       <Setter Property="RenderDefaulted" TargetName="Chrome" Value="true"/>
      </Trigger>
      <Trigger Property="ToggleButton.IsChecked" Value="true">
       <Setter Property="RenderPressed" TargetName="Chrome" Value="true"/>
      </Trigger>
      <Trigger Property="IsEnabled" Value="false">
       <Setter Property="Foreground" Value="#ADADAD"/>
      </Trigger>
     </ControlTemplate.Triggers>
    </ControlTemplate>
   </Setter.Value>
  </Setter>
 </Style>