// Stop button private void StopButton() { guiControls.onOffStop.SetImage("icons8stop40"); guiControls.onOffStop.OnClick( (object sender, EventArgs e) => { CloseOpenMenu(); Exec.EndingExecution(); // signals that we should stop }); guiControls.onOffStop.Visible(false); guiControls.onOffStop.Enabled(false); }