C#--監控Enter和Esc事件

1，對於winform自帶的Button按鈕

this.CancelButton = this.button1;//設置Esc鍵
this.AcceptButton = this.button2;//設置Enter鍵　　

2，對於自定義的按鈕

        public FrmUserLogin()
        {
            InitializeComponent();
            this.KeyPreview = true;//WinForm下的鍵盤事件(KeyPress、KeyDown)不響應的大多數原因
            this.KeyDown += FrmUserLogin_KeyDown;
        }

        private void FrmUserLogin_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                this.btn_login_Click(null,null);
            }
        }