using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace demo11
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            this.KeyPreview = true;
            this.KeyDown += new KeyEventHandler(Form1_KeyDown);
            this.Load+=new EventHandler(Form1_Load);
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            TextBox txtUserName = new TextBox();
            txtUserName.Location = new Point(10, 10);
            this.Controls.Add(txtUserName);
            TextBox txtPassword = new TextBox();
            txtPassword.Location = new Point(10, 40);
            this.Controls.Add(txtPassword);
            Button btnSubmit = new Button();
            btnSubmit.Text = "提交";
            btnSubmit.Click +=new EventHandler(btnSubmit_Click);
            btnSubmit.Location = new Point(10, 70);
            this.Controls.Add(btnSubmit);
        }
        void Form1_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                e.Handled = true;   //將Handled設定為true，指示已經處理過KeyPress事件
                btnSubmit_Click(sender, e);
            }
        }
        void btnSubmit_Click(object sender, EventArgs e)
        {
            MessageBox.Show("hello world!");
        }
    }
}