protected override void OnKeyDown(KeyEventArgs e)
{
e.Handled = true;
e.SuppressKeyPress = true;
if (e.KeyData == Keys.Delete || e.KeyData == Keys.Back)
{
Shortcut = null;
}
else if (KeyboardUtils.IsValidShortcutKey(e.KeyCode))
{
Shortcut = KeyboardUtils.CreateShortcut(e);
}
}