<Window x:Class="Commands.NoCommandTextBox" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="NoCommandTextBox" Height="300" Width="300"> <Grid> <TextBox Name="txt"/> </Grid> </Window> //File:Window.xaml.cs using System; using System.Collections.Generic; using System.Text; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Shapes; namespace Commands { public partial class NoCommandTextBox : System.Windows.Window { public NoCommandTextBox() { InitializeComponent(); txt.InputBindings.Add(new KeyBinding(ApplicationCommands.NotACommand, Key.C, ModifierKeys.Control)); } private void SuppressCommand(object sender, CanExecuteRoutedEventArgs e) { e.CanExecute = false; e.Handled = true; } } }