private void ShowHotKeySettingsForm()
 {
     if (_hotkeySettingsForm != null)
     {
         _hotkeySettingsForm.Activate();
     }
     else
     {
         _hotkeySettingsForm = new HotkeySettingsForm(controller);
         _hotkeySettingsForm.Show();
         _hotkeySettingsForm.Activate();
         _hotkeySettingsForm.FormClosed += hotkeySettingsForm_FormClosed;
     }
 }
 void hotkeySettingsForm_FormClosed(object sender, FormClosedEventArgs e)
 {
     _hotkeySettingsForm.Dispose();
     _hotkeySettingsForm = null;
 }