监控目录中文件的变化---FindFirstChangeNotification

#include "stdafx.h"

void WatchDirectory(LPTSTR lpDir)
{
DWORD dwWaitStatus,dwRet(0);
HANDLE dwChangeHandles[3];
TCHAR lpDrive[4] = {0},lpFile[_MAX_FNAME] = {0},lpExt[_MAX_EXT] = {0};

_tsplitpath(lpDir, lpDrive,NULL, lpFile, lpExt);
lpDrive[2] = (TCHAR)'\\';
lpDrive[3] = (TCHAR)'\0';

//分别监控文件名，路径名，文件内容的修改
dwChangeHandles[0] = FindFirstChangeNotification(
lpDir,
TRUE,
FILE_NOTIFY_CHANGE_FILE_NAME); //文件名
if (dwChangeHandles[0] == INVALID_HANDLE_VALUE){
ExitProcess(GetLastError());
}

dwChangeHandles[1] = FindFirstChangeNotification(
lpDrive,
TRUE,
FILE_NOTIFY_CHANGE_DIR_NAME); //路径名
if (dwChangeHandles[1] == INVALID_HANDLE_VALUE){
ExitProcess(GetLastError());
}

dwChangeHandles[2] = FindFirstChangeNotification(
lpDir,
TRUE,
FILE_NOTIFY_CHANGE_LAST_WRITE); //文件内容/或者说最后保存时间
if (dwChangeHandles[2] == INVALID_HANDLE_VALUE){
ExitProcess(GetLastError());
}

//改变通知已经设置完成，现在只需等待这些通知被触发，然后做相应处理
while (TRUE)
{
dwWaitStatus= WaitForMultipleObjects(3, dwChangeHandles, FALSE, INFINITE);

switch(dwWaitStatus)
{
case WAIT_OBJECT_0:
printf("文件名发生了改变！\n");
if(FindNextChangeNotification(dwChangeHandles[0]) == FALSE ){
ExitProcess(GetLastError());
}
break;

case WAIT_OBJECT_0 + 1:
printf("目录名发生了改变！\n");
if(FindNextChangeNotification(dwChangeHandles[1]) == FALSE){
ExitProcess(GetLastError());
}
break;

case WAIT_OBJECT_0 + 2:
printf("最后保存时间发生了改变！\n");
if(FindNextChangeNotification(dwChangeHandles[2]) == FALSE){
ExitProcess(GetLastError());
}
break;
default:
ExitProcess(GetLastError());
break;
}
}

_endthread();
}

void MonitorThread(void* arg)
{
WatchDirectory("D:\\Data");
}

int _tmain(int argc, _TCHAR* argv[])
{
_beginthread(MonitorThread,10240,NULL);

while (TRUE)
{
Sleep(1000);
}

return 0;
}