TemplateVisualStateAttribute Class

<TemplateVisualStateAttribute(Name:="Pressed", GroupName:="CommonStates")> _
<TemplateVisualStateAttribute(Name:="Focused", GroupName:="FocusStates")> _
<TemplateVisualStateAttribute(Name:="Normal", GroupName:="CommonStates")> _
<TemplateVisualStateAttribute(Name:="MouseOver", GroupName:="CommonStates")> _
<TemplateVisualStateAttribute(Name:="Disabled", GroupName:="CommonStates")> _
<TemplateVisualStateAttribute(Name:="Unfocused", GroupName:="FocusStates")> _
Public Class Button
    Inherits ButtonBase

End Class

[TemplateVisualState(Name = "Normal", GroupName = "CommonStates")]
[TemplateVisualState(Name = "MouseOver", GroupName = "CommonStates")]
[TemplateVisualState(Name = "Pressed", GroupName = "CommonStates")]
[TemplateVisualState(Name = "Disabled", GroupName = "CommonStates")]
[TemplateVisualState(Name = "Unfocused", GroupName = "FocusStates")]
[TemplateVisualState(Name = "Focused", GroupName = "FocusStates")]
public class Button : ButtonBase
{
}

<ControlTemplate TargetType="Button">
  <Border x:Name="RootElement">

    <VisualStateManager.VisualStateGroups>

      <!--Define the states for the common states.
          The states in the VisualStateGroup are mutually exclusive to
          each other.-->
      <VisualStateGroup x:Name="CommonStates">

        <!--The Normal state is the state the button is in
            when it is not in another state from this VisualStateGroup.-->
        <VisualState x:Name="Normal" />

        <!--Change the SolidColorBrush, BorderBrush, to red when the
            mouse is over the button.-->
        <VisualState x:Name="MouseOver">
          <Storyboard>
            <ColorAnimation Storyboard.TargetName="BorderBrush" 
                              Storyboard.TargetProperty="Color" To="Red" />

          </Storyboard>

        </VisualState>

        <!--Change the SolidColorBrush, BorderBrush, to Transparent when the
            button is pressed.-->
        <VisualState x:Name="Pressed">
          <Storyboard >
            <ColorAnimation Storyboard.TargetName="BorderBrush" 
                              Storyboard.TargetProperty="Color" To="Transparent"/>
          </Storyboard>
        </VisualState>
          <!--The Disabled state is omitted for brevity.-->
        </VisualStateGroup>

    </VisualStateManager.VisualStateGroups>


    <Border.Background>
      <SolidColorBrush x:Name="BorderBrush" Color="Black"/>
    </Border.Background>

    <Grid Background="{TemplateBinding Background}" Margin="4">
      <ContentPresenter
        HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
        VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
        Margin="4,5,4,4" />

    </Grid>


  </Border>
</ControlTemplate>