module1.vb

适合VB初学者看

Imports System
Imports System.Threading
Module Module1
    Sub Main()
        '输出当前时间
        Dim nowTime As DateTime
        nowTime = nowTime.Now
        Console.WriteLine("开始显示时间：" + nowTime.Hour.ToString() + _
                            ":" + nowTime.Minute.ToString() + ":" + _
                            nowTime.Second.ToString())
        Dim mutex1 As Mutex = New Mutex(True)
        Dim theClass As class1 = New class1()
        Dim WorTCallBack As WaitOrTimerCallback = _
                    New WaitOrTimerCallback(AddressOf theClass.CallBackMethod)
        '主线程拥有这个互斥体
        '注册WaitHandler的回调方法
        '传递给方法代表的对象参数
        '延迟时间为2000毫秒
        '周期性地设置定时器
        ThreadPool.RegisterWaitForSingleObject( _
                    mutex1, WorTCallBack, theClass, 2000, False)
        '主线程开始等待10秒钟
        Thread.Sleep(10000)
        Console.WriteLine("按回车键退出程序！")
        Console.ReadLine()
    End Sub
    Public Class class1
        Public Sub CallBackMethod(ByVal Obj As Object, ByVal b As Boolean)
            '输出当前时间
            Dim nowTime As DateTime
            nowTime = nowTime.Now
            Console.WriteLine(nowTime.Hour.ToString() + ":" + _
                            nowTime.Minute.ToString() + ":" + _
                            nowTime.Second.ToString())
        End Sub
    End Class
End Module