using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Runtime.InteropServices;
using?System.Text;
using?System.Threading.Tasks;
using?System.Timers;
using?System.Threading;
using?System.IO;
namespace?usTimer
{
????//使用windows.h中的函數(shù)，加載DLL來使用
????public?static?class?QueryPerformanceMethd
????{
????????[DllImport（“kernel32.dll“）]
????????public?extern?static?short?QueryPerformanceCounter（ref?long?x）;

????????[DllImport（“kernel32.dll“）]
????????public?extern?static?short?QueryPerformanceFrequency（ref?long?x）;
????}
????public?class?usTimerEventArgs?:?EventArgs
????{
????????public?double?Timenow?=?0;
????????public?usTimerEventArgs（double?inputTime）
????????{
????????????Timenow?=?inputTime;
????????}
????}
????public?delegate?void?ElapsedEvent（object?Sender?usTimerEventArgs?e）;
????class?usTimer
????{
????????long?stop_Value?=?0;
????????long?start_Value?=?0;
????????long?freq?=?0;
????????double?time?=?0;
????????bool?stop?=?true;
????????/