<Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:custom="clr-namespace:WpfApplication1" Title="gotfocusLostfocusEffectUsingEvent" Height="400" Width="450" > <StackPanel> <StackPanel.Resources> <Style TargetType="{x:Type Button}"> <Setter Property="Height" Value="20"/> <Setter Property="Width" Value="250"/> <Setter Property="HorizontalAlignment" Value="Left"/> </Style> </StackPanel.Resources> <Button GotFocus="OnGotFocusHandler" LostFocus="OnLostFocusHandler">Click Or Tab To Give Keyboard Focus</Button> <Button GotFocus="OnGotFocusHandler" LostFocus="OnLostFocusHandler">Click Or Tab To Give Keyborad Focus</Button> </StackPanel> </Window> //File:Window.xaml.cs using System; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Media; using System.Windows.Input; namespace WpfApplication1 { public partial class Window1 : Window { public Window1() { InitializeComponent(); } private void OnGotFocusHandler(object sender, RoutedEventArgs e) { Button tb = e.Source as Button; tb.Background = Brushes.Red; } private void OnLostFocusHandler(object sender, RoutedEventArgs e) { Button tb = e.Source as Button; tb.Background = Brushes.White; } } }