hiddentimer.cpp

练习利用Windows时钟编程

// HiddenTimer.cpp : Defines the entry point for the application.
//

#include "stdafx.h"

VOID CALLBACK TimerProc(
  HWND hwnd,     // handle of window for timer messages
  UINT uMsg,     // WM_TIMER message
  UINT idEvent,  // timer identifier
  DWORD dwTime   // current system time
);

int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
 	// TODO: Place code here.
	
	SetTimer(NULL, 8899, 5000, TimerProc);

	MSG msg;
	while (GetMessage(&msg, NULL, 0, 0)) 
	{
			TranslateMessage(&msg);
			DispatchMessage(&msg);
	}
	return 0;
}

VOID CALLBACK TimerProc(
  HWND hwnd,     // handle of window for timer messages
  UINT uMsg,     // WM_TIMER message
  UINT idEvent,  // timer identifier
  DWORD dwTime   // current system time
)
{
	MessageBox(GetDesktopWindow(), NULL,NULL,MB_OK);
}