<Window x:Class="WpfApp47.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:local="clr-namespace:WpfApp47" mc:Ignorable="d" WindowState="Maximized" Title="MainWindow" Height="450" Width="800"> <Grid> <Grid.RowDefinitions> <RowDefinition Height="Auto"/> <RowDefinition/> </Grid.RowDefinitions> <ToolBar Grid.Row="0"> <Button Content="Copy" FontSize="16" Margin="4" Padding="4" Command="Copy" ToolTip="Copy the selected text to the clipboard"/> <Button Content="Paste" FontSize="16" Margin="4" Padding="4" Command="Paste"> <Button.ToolTip> <ToolTip> <Border CornerRadius="10" BorderThickness="2" BorderBrush="Black" Padding="4" Background="LightBlue"> <Grid Width="120"> <TextBlock FontSize="15" TextWrapping="Wrap" Text="Paste text from the clipboard"/> </Grid> </Border> </ToolTip> </Button.ToolTip> </Button> <Button Content="Undo" Command="Undo" FontSize="16" Margin="4" Padding="4" ToolTipService.HasDropShadow="False"> <Button.Resources> <Style TargetType="ToolTip"> <Setter Property="Background" Value="Transparent"/> <Setter Property="BorderBrush" Value="Transparent"/> </Style> </Button.Resources> <Button.ToolTip> <Border CornerRadius="10" BorderThickness="2" BorderBrush="Black" Padding="4" Background="LightBlue"> <Grid> <TextBlock FontSize="15" TextWrapping="Wrap" Text="Undo the last action"/> </Grid> </Border> </Button.ToolTip> </Button> </ToolBar> <TextBox Grid.Row="1" AcceptsReturn="True" FontSize="14" VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto"/> </Grid> </Window>