WPF Custom Controls - Without The Pain

<ResourceDictionary
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:CustomControls">

    <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="/CustomControls;component/Themes/resXSButtonStyles.xaml" />
    </ResourceDictionary.MergedDictionaries>


    <Style TargetType="{x:Type local:XSButton}" >
        
        <!-- Provide DEFAULT values for some properties -->
        <Setter Property="CornerRadius" Value="4" />
        <Setter Property="Background" Value="{StaticResource brushClearGlass}" />
        <Setter Property="OuterBorderBrush" Value="{StaticResource brushOuterBorder}" />
        <Setter Property="OuterBorderThickness" Value="1" />
        <Setter Property="InnerBorderBrush" Value="{StaticResource brushInnerBorder}" />
        <Setter Property="InnerBorderThickness" Value="1" />
        <Setter Property="GlowColor" Value="{StaticResource brushGlow}" />
        
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type local:XSButton}">

                    <Border Name="OuterBorder" CornerRadius="{Binding CornerRadius, ElementName=InnerBorder}"
                            BorderBrush="{TemplateBinding OuterBorderBrush}" BorderThickness="{TemplateBinding OuterBorderThickness}" >
                        
                        <Border Name="InnerBorder" Background="{TemplateBinding Background}" CornerRadius="{TemplateBinding CornerRadius}"
                                BorderBrush="{TemplateBinding InnerBorderBrush}" BorderThickness="{TemplateBinding InnerBorderThickness}" >
                            
                            <Grid >

                                <Border Name="Glow" Opacity="0" CornerRadius="{Binding CornerRadius, ElementName=InnerBorder}">
                                    <Border.Background>
                                        <RadialGradientBrush>
                                            <GradientStop Offset="0" Color="{Binding GlowColor, RelativeSource={RelativeSource TemplatedParent},
                                                Converter={StaticResource ColorToAlphaColorConverter}, ConverterParameter=176}" />
                                            <GradientStop Offset="1" Color="{Binding GlowColor, RelativeSource={RelativeSource TemplatedParent},
                                                Converter={StaticResource ColorToAlphaColorConverter}, ConverterParameter=0}" />
                                        </RadialGradientBrush>
                                    </Border.Background>
                                </Border>
                                
                                <Border Name="padding" Margin="{TemplateBinding Padding}"
                                        HorizontalAlignment="Center" VerticalAlignment="Center">
                                    <ContentPresenter Name="content" />
                                </Border>
                                
                                <Control Name="Highlight" Template="{TemplateBinding HighlightAppearance}" />
                                
                            </Grid>
                        </Border>
                    </Border>
                    
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsPressed" Value="True">
                            <Setter TargetName="OuterBorder" Property="Opacity" Value="0.9" />
                            <Setter TargetName="InnerBorder" Property="Opacity" Value="0.9"/>
                            <Setter TargetName="content" Property="Margin" Value="2,2,0,0"/>
                            <Setter TargetName="Glow" Property="Opacity" Value="0.5" />
                            <Setter TargetName="Highlight" Property="Opacity" Value="0.5"/>
                        </Trigger>
                        
                        <Trigger Property="IsMouseOver" Value="True">
                            <Trigger.EnterActions>
                                <BeginStoryboard Storyboard="{StaticResource GlowOn}"/>
                            </Trigger.EnterActions>
                            <Trigger.ExitActions>
                                <BeginStoryboard Storyboard="{StaticResource GlowOff}"/>
                            </Trigger.ExitActions>
                        </Trigger>
                    </ControlTemplate.Triggers>
                    
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>


</ResourceDictionary>