code: @Override
  	protected boolean handleCtrlKeyDown(int keyCode)
  	{
  		return GuiScreen.isCtrlKeyDown() && !(keyCode == Keyboard.KEY_C || keyCode == Keyboard.KEY_X) && super.handleCtrlKeyDown(keyCode);
  	}
docs: Handle ctrl key down.
  
  @param keyCode the key code
  @return true, if successful