WPF VB.Net

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="NoCommandTextBox" Height="300" Width="300">
    
      
    


//File:Window.xaml.vb
Imports System
Imports System.Collections.Generic
Imports System.Text
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Data
Imports System.Windows.Documents
Imports System.Windows.Input
Imports System.Windows.Media
Imports System.Windows.Media.Imaging
Imports System.Windows.Shapes
Namespace Commands
  Public Partial Class NoCommandTextBox
    Inherits System.Windows.Window
    Public Sub New()
      InitializeComponent()
      txt.CommandBindings.Add(New CommandBinding(ApplicationCommands.Cut, Nothing, AddressOf SuppressCommand))
    End Sub
    Private Sub SuppressCommand(sender As Object, e As CanExecuteRoutedEventArgs)
      e.CanExecute = False
      e.Handled = True
    End Sub
  End Class
End Namespace