比如，有2个输入框，
要求载入form时，输入光标焦点自动在TEXTBOX1上，输入回车后，焦点自动落在输入框TEXTBOX2上？？？？

我是这样的代码，奇怪的是可以运行处登录界面，但是任何一个按钮点击都没反应，包括回车！
能否帮我看看？
 
using System;
using System.Collections.Generic;
using
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace gkshjd
{
    public partial class frm_login : Form
    {
        public frm_login()
        {
            InitializeComponent();
            txtuser.Focus();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            txtuser.Focus();
        }

        private void txtuser_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar == 13)
            {
                txtpwd.Focus();
            }
        }

        private void txtPwd_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar == 13)
            {
                btnsubmit_Click(sender, e);
            }
        }

       private void btnsubmit_Click(object sender, EventArgs e)
        {
            if (MessageBox.Show("确定退出系统吗？", "提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Asterisk) == DialogResult.OK)
            {
                Application.Exit();
            }
         }
      private void btnexit_Click(object sender, EventArgs e)
        {
            if (MessageBox.Show("确定退出系统吗？", "提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Asterisk) == DialogResult.OK)
            {
                Application.Exit();
            }
        }   
     }

   
 }

[ 本帖最后由 zjdjh 于 2012-3-12 18:55 编辑 ]

这是文件，能否帮我看看！！！！