我写的定时关机的程序。但是却不能定时，帮忙看一下，好像是timer那些地方有问题还是。。
要定时关机、重启等等
不定时的话，关机重启都没问题，
加入定时就出问题了
好像是定时了之后，判断那出现问题，反正就是时间到了执行不了关机
谁帮我一下哦


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 WindowsFormsApplication1
{
  public partial class Form1 : Form
  {
  static System.Windows.Forms.Timer myTimer = new System.Windows.Forms.Timer();
  public Form1()
  {
  InitializeComponent();
  }
//设置计时变量
  public static int hour = 0;
  public static int minute = 0;
  public static int second = 0;

  public void button1_Click(object sender, EventArgs e)
  {
  //开始计时，变量归零
  second = 0;
  minute = 0;
  hour = 0;
   
  API ACT = new API();
  string 选择=Convert.ToString(cbStyle.SelectedItem);
  if(选择=="定时重启")
  {
  //比较时间是否到了
  if (Convert.ToString(cbHour.SelectedItem) == hour.ToString() && Convert.ToString(cbMin.SelectedItem) == minute.ToString() && Convert.ToString(cbSec.SelectedItem) == second.ToString())
  ACT.Reboot();
  /*System.Diagnostics.Process bootprocess=new System .Diagnostics.Process ();
  bootprocess.StartInfo.FileName="reboot";
  bootprocess.StartInfo.Arguments="/s";*/
  }
  if(选择=="定时关机")
  {
  // Sets the timer interval to 5 seconds.
  if(Convert.ToString(cbHour.SelectedItem) == hour.ToString() && Convert.ToString(cbMin.SelectedItem) == minute.ToString() && Convert.ToString(cbSec.SelectedItem) ==second.ToString())
  ACT.PowerOff();
  /*System.Diagnostics.Process bootprocess=new System .Diagnostics.Process ();
  bootprocess.StartInfo.FileName="shutdown";
  bootprocess.StartInfo.Arguments="/s";*/
  }
  /* if(选择=="定时睡眠")
  {

  }*/
  }

  public void timer1_Tick(object sender, EventArgs e)
  {
  //计时变量自增
  second++;
  if (second == 60)
  {
  minute++;
  second = 0;
  }
  if (minute == 60)
  {
  hour++;
  minute = 0;
  }
  }
   

  public void cbHour_SelectedIndexChanged(object sender, EventArgs e)
  {
  //下拉选择关机时间
  cbMin.Items.Clear();
  cbSec.Items.Clear();
  for (int i = 0; i <=59; i++)
  {
   
  cbMin.Items.Add(i);
  cbSec.Items.Add(i);
  }
  }

  private void dTP_Now_ValueChanged(object sender, EventArgs e)
  {

  }

  private