winfrom键盘左右移动事件

Question

public void keyEvent(Keys key)
        {            switch (key)
            {
                case Keys.Up: moveUpOrDown('U'); this.Invalidate(); break;
                case Keys.Down: moveUpOrDown('D'); this.Invalidate(); break;
                case Keys.PageUp: pageUpOrDown('U'); this.Invalidate(); break;
                case Keys.PageDown: pageUpOrDown('D'); this.Invalidate(); break;
                case Keys.Right://这里是写什么方法 ？                case Keys.Left://这里是写什么方法 ？                 
                case Keys.Enter:
                    break;
            }
        }
各位大侠邦帮忙啊！！！

Answer 1

ActiveForm.Left -= 1;
ActiveForm.Left += 1;

Answer 2

不能加在那个case Keys.Right后面啊？