One thing that might work for you it to try to catch the ctl+V
yourself in the KeyDown event and handle the paste yourself.

void textBox1_KeyDown(object sender, KeyEventArgs e)
{
   if (e.KeyCode == Keys.V && (e.Modifiers & Keys.Control) !=
Keys.None)
   {
       TextBox tb = sender as TextBox;
       string textToPaste =  Clipboard.GetText();
       tb.Paste();
       e.Handled = true;
       e.SuppressKeyPress = true;
       Console.WriteLine("Pasted: {0}", textToPaste);
   }
}

===============
Clay Burch
Syncfusion, Inc.

Hi,

You can do that by inherting new control from the text box control and
overriding WndProc in order to detect WM_PASTE message. Here is an example
for an overriden WndProc

private const int WM_PASTE = 0x0302;
 protected override void WndProc(ref Message m)
 {
  if (m.Msg == WM_PASTE)
  {
   MessageBox.Show("Paste");
  }
  base.WndProc(ref m);
 }