自动关机代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace AutoShutDown
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            this.btnStop.Enabled = false;
        }

        int count = 0;
        int maxCount = 0;
        private void btnStart_Click(object sender, EventArgs e)
        {
            maxCount = (int)this.udTimeout.Value;
            count = 0;
            this.timer1.Interval = 60000;
            this.timer1.Start();
            this.btnStart.Enabled = this.udTimeout.Enabled = false;
            this.btnStop.Enabled = true;
            this.lblInfo.Text = string.Format("{0}分钟", maxCount);
        }

        private void btnStop_Click(object sender, EventArgs e)
        {
            this.timer1.Stop();
            this.btnStart.Enabled = this.udTimeout.Enabled = true;
            this.btnStop.Enabled = false;
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            count++;
            if (count >= maxCount)
            {
                this.timer1.Stop();
                ShutDown.DoExitWin(ShutDown.EWX_SHUTDOWN);
            }
            this.lblInfo.Text = string.Format("{0}分钟", maxCount - count);
        }
    }

    public class ShutDown
    {
        [StructLayout(LayoutKind.Sequential, Pack = 1)]
        internal struct TokPriv1Luid
        {
            public int Count;
            public long Luid;
            public int Attr;
        }

        [DllImport("kernel32.dll", ExactSpelling = true)]
        internal static extern IntPtr GetCurrentProcess();

        [DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]
        internal static extern bool OpenProcessToken(IntPtr h, int acc, ref IntPtr phtok);

        [DllImport("advapi32.dll", SetLastError = true)]
        internal static extern bool LookupPrivilegeValue(string host, string name, ref long pluid);

        [DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]
        internal static extern bool AdjustTokenPrivileges(IntPtr htok, bool disall, ref TokPriv1Luid newst, int len, IntPtr prev, IntPtr relen);

        [DllImport("user32.dll", ExactSpelling = true, SetLastError = true)]
        internal static extern bool ExitWindowsEx(int flg, int rea);

        internal const int SE_PRIVILEGE_ENABLED = 0x00000002;
        internal const int TOKEN_QUERY = 0x00000008;
        internal const int TOKEN_ADJUST_PRIVILEGES = 0x00000020;
        internal const string SE_SHUTDOWN_NAME = "SeShutdownPrivilege";
        internal const int EWX_LOGOFF = 0x00000000;
        internal const int EWX_SHUTDOWN = 0x00000001;
        internal const int EWX_REBOOT = 0x00000002;
        internal const int EWX_FORCE = 0x00000004;
        internal const int EWX_POWEROFF = 0x00000008;
        internal const int EWX_FORCEIFHUNG = 0x00000010;

        public static void DoExitWin(int flg)
        {
            bool ok;
            TokPriv1Luid tp;
            IntPtr hproc = GetCurrentProcess();
            IntPtr htok = IntPtr.Zero;
            ok = OpenProcessToken(hproc, TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, ref htok);
            tp.Count = 1;
            tp.Luid = 0;
            tp.Attr = SE_PRIVILEGE_ENABLED;
            ok = LookupPrivilegeValue(null, SE_SHUTDOWN_NAME, ref tp.Luid);
            ok = AdjustTokenPrivileges(htok, false, ref tp, 0, IntPtr.Zero, IntPtr.Zero);
            ok = ExitWindowsEx(flg, 0);
        }
    }

}

namespace AutoShutDown
{
    partial class Form1
    {
        /// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows 窗体设计器生成的代码

        /// <summary>
        /// 设计器支持所需的方法 - 不要
        /// 使用代码编辑器修改此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.components = new System.ComponentModel.Container();
            this.label1 = new System.Windows.Forms.Label();
            this.udTimeout = new System.Windows.Forms.NumericUpDown();
            this.btnStart = new System.Windows.Forms.Button();
            this.btnStop = new System.Windows.Forms.Button();
            this.timer1 = new System.Windows.Forms.Timer(this.components);
            this.label2 = new System.Windows.Forms.Label();
            this.lblInfo = new System.Windows.Forms.Label();
            ((System.ComponentModel.ISupportInitialize)(this.udTimeout)).BeginInit();
            this.SuspendLayout();
            // 
            // label1
            // 
            this.label1.AutoSize = true;
            this.label1.Location = new System.Drawing.Point(12, 9);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(65, 12);
            this.label1.TabIndex = 0;
            this.label1.Text = "设定时间：";
            // 
            // udTimeout
            // 
            this.udTimeout.Location = new System.Drawing.Point(83, 7);
            this.udTimeout.Name = "udTimeout";
            this.udTimeout.Size = new System.Drawing.Size(120, 21);
            this.udTimeout.TabIndex = 1;
            this.udTimeout.Value = new decimal(new int[] {
            30,
            0,
            0,
            0});
            // 
            // btnStart
            // 
            this.btnStart.Location = new System.Drawing.Point(246, 6);
            this.btnStart.Name = "btnStart";
            this.btnStart.Size = new System.Drawing.Size(75, 23);
            this.btnStart.TabIndex = 2;
            this.btnStart.Text = "开始";
            this.btnStart.UseVisualStyleBackColor = true;
            this.btnStart.Click += new System.EventHandler(this.btnStart_Click);
            // 
            // btnStop
            // 
            this.btnStop.Location = new System.Drawing.Point(246, 35);
            this.btnStop.Name = "btnStop";
            this.btnStop.Size = new System.Drawing.Size(75, 23);
            this.btnStop.TabIndex = 3;
            this.btnStop.Text = "终止";
            this.btnStop.UseVisualStyleBackColor = true;
            this.btnStop.Click += new System.EventHandler(this.btnStop_Click);
            // 
            // timer1
            // 
            this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
            // 
            // label2
            // 
            this.label2.AutoSize = true;
            this.label2.Location = new System.Drawing.Point(12, 40);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(77, 12);
            this.label2.TabIndex = 4;
            this.label2.Text = "离关机还剩：";
            // 
            // lblInfo
            // 
            this.lblInfo.AutoSize = true;
            this.lblInfo.Location = new System.Drawing.Point(150, 40);
            this.lblInfo.Name = "lblInfo";
            this.lblInfo.Size = new System.Drawing.Size(53, 12);
            this.lblInfo.TabIndex = 5;
            this.lblInfo.Text = "剩余时间";
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(340, 64);
            this.Controls.Add(this.lblInfo);
            this.Controls.Add(this.label2);
            this.Controls.Add(this.btnStop);
            this.Controls.Add(this.btnStart);
            this.Controls.Add(this.udTimeout);
            this.Controls.Add(this.label1);
            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.Fixed3D;
            this.MaximizeBox = false;
            this.Name = "Form1";
            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
            this.Text = "Form1";
            ((System.ComponentModel.ISupportInitialize)(this.udTimeout)).EndInit();
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.NumericUpDown udTimeout;
        private System.Windows.Forms.Button btnStart;
        private System.Windows.Forms.Button btnStop;
        private System.Windows.Forms.Timer timer1;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.Label lblInfo;
    }
}