private void cmbSeqHeading_PreviewKeyDown(object sender, KeyEventArgs e)
{
if ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control && e.Key == Key.Insert)
{
tsmvm.InsertNewSubHeading();
e.Handled = true;
txtBotNote.Text = "";
txtTopNote.Text = "";
}
else if ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control && e.Key == Key.Delete)
{
tsmvm.DeleteNewSubHeading();
e.Handled = true;
}
}
