请问c++怎么做一个定时程序

我想让它每隔两小时弹出一个窗口提示：休息一下，休息一下。
要一个控制台程序，最好不要mfc的控制台程序，也别用系统的计划任务，感觉用哪个干脆就别编程了

答案：//GetTickCount方法效率太低
//Sleep会使程序卡住且并且要关闭对话框才能继续即时
//用Timer消息才是最完美的
// consoleTimer.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include<windows.h>
HINSTANCE hInst;       
TCHAR szTitle[128]="控制台提醒程序^_^";   
TCHAR szWindowClass[128]="HuazaiWindow"; 
ATOM    MyRegisterClass(HINSTANCE hInstance);
BOOL    InitInstance(HINSTANCE, int);
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
#pragma comment(lib,"user32.lib")
int  main()
{
  // TODO: Place code here.
 MSG msg;
 hInst=GetModuleHandle(NULL);
 ATOM atom=MyRegisterClass(hInst);
 // Perform application initialization:
 if (!InitInstance (hInst, SW_HIDE)) 
 {
  return FALSE;
 }
 while (GetMessage(&msg, NULL, 0, 0)) 
 {
  TranslateMessage(&msg);
  DispatchMessage(&msg);
 }
 return (int) msg.wParam;
}
 
//
//  FUNCTION: MyRegisterClass()
//
//  PURPOSE: Registers the window class.
//
//  COMMENTS:
//
//    This function and its usage are only necessary if you want this code
//    to be compatible with Win32 systems prior to the 'RegisterClassEx'
//    function that was added to Windows 95. It is important to call this function
//    so that the application will get 'well formed' small icons associated
//    with it.
//
WNDCLASSEX wcex;
ATOM MyRegisterClass(HINSTANCE hInstance)
{
 
 wcex.cbSize = sizeof(WNDCLASSEX); 
 wcex.style   = CS_HREDRAW | CS_VREDRAW;
 wcex.lpfnWndProc = (WNDPROC)WndProc;
 wcex.cbClsExtra  = 0;
 wcex.cbWndExtra  = 0;
 wcex.hInstance  = hInstance;
 //wcex.hIcon   = LoadIcon(hInstance, (LPCTSTR)IDI_WIN32);
 wcex.hCursor  = LoadCursor(NULL, IDC_ARROW);
 wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
 //wcex.lpszMenuName = (LPCTSTR)IDC_WIN32;
 wcex.lpszClassName = szWindowClass;
 //wcex.hIconSm  = LoadIcon(wcex.hInstance, (LPCTSTR)IDI_SMALL);
 return RegisterClassEx(&wcex);
}
//
//   FUNCTION: InitInstance(HANDLE, int)
//
//   PURPOSE: Saves instance handle and creates main window
//
//   COMMENTS:
//
//        In this function, we save the instance handle in a global variable and
//        create and display the main program window.
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
   HWND hWnd;
   hInst = hInstance; // Store instance handle in our global variable
   hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
      CW_USEDEFAULT, 0, 300, 200, NULL, NULL, hInstance, NULL);
   if (!hWnd)
   {
      return FALSE;
   }
 
   return TRUE;
}
//
//  FUNCTION: WndProc(HWND, unsigned, WORD, LONG)
//
//  PURPOSE:  Processes messages for the main window.
//
//  WM_COMMAND - process the application menu
//  WM_PAINT - Paint the main window
//  WM_DESTROY - post a quit message and return
//
//
 
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
 int wmId, wmEvent;
 PAINTSTRUCT ps;
 HDC hdc;
 HWND hwndNotepad=NULL;
 RECT rect;
 char* str;
 switch (message) 
 {
 case WM_CREATE:
  SetTimer(hWnd,18829777,1000,NULL);
  break;
 case WM_TIMER:
  ShowWindow(hWnd, SW_SHOW);
  UpdateWindow(hWnd);
  break;
 case WM_COMMAND:
  wmId    = LOWORD(wParam); 
  wmEvent = HIWORD(wParam); 
  // Parse the menu selections:
  switch (wmId)
  {
  //case IDM_EXIT:
  // KillTimer(hWnd,18829777);
  // //DestroyWindow(hWnd);
  // break;
  default:
   return DefWindowProc(hWnd, message, wParam, lParam);
  }
  break;
 case WM_PAINT:
  hdc = BeginPaint(hWnd, &ps);
  GetClientRect(hWnd,&rect);
  str="您该休息下了^_^";
  DrawText(hdc,str,strlen(str),&rect,DT_CENTER);
  //TextOut(
  EndPaint(hWnd, &ps);
  break;
 case WM_CLOSE:
  ShowWindow(hWnd,SW_HIDE);
 case WM_DESTROY:
  //PostQuitMessage(0);
  break;
 default:
  return DefWindowProc(hWnd, message, wParam, lParam);
 }
 return 0;
}
GetTickCount可以取时间计数值，判断两次取的差值，可以满足实现2小时间隔要求，但整体不知是否合适，仅供参考。
Sleep(3600*2*1000);
timer  

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