Доброго здравия!
https://help.zennolab.com/en/v5/zennoposter/5.1/ZennoLab.CommandCenter~ZennoLab.CommandCenter.Tab~KeyEvent.html
istance.ActiveTab.KeyEvent("a", "press", "ctrl"); -> istance.ActiveTab.KeyEvent("enter", "press", "shift");
System.Windows.Forms.SendKeys.Send("+{ENTER}");
и...