Why are some textboxes not accepting Control + A shortcut to select all by default

Question

I have found a few textboxes here and there in my program that accepts Control+A shortcut to select the entire text \"by default\" with \"no coding\".

I don\'t know

Answer 1

Indeed CTRL + A will not work unless you add something like this:

  private void textBox1_KeyDown(object sender, KeyEventArgs e)
  {
      if (e.Control && (e.KeyCode == Keys.A))
      {
          if (sender != null)
               ((TextBox)sender).SelectAll();
          e.Handled = true;
      }
  }