WinCE的一個工作例子void?FileInfoHelper::WatchFileChanges(?TCHAR?*ptcFileBaseDir,?TCHAR?*ptcFileName?){static?int?iCount?=?0;DWORD?dwWaitStatus;?HANDLE?dwChangeHandles;?if(?!?ptcFileBaseDir?||?!?ptcFileName?)?return;wstring?wszFileNameToWatch?=?ptcFileName;dwChangeHandles?=?FindFirstChangeNotification(

ptcFileBaseDir,

FALSE,

FILE_NOTIFY_CHANGE_FILE_NAME?|

FILE_NOTIFY_CHANGE_DIR_NAME?|

FILE_NOTIFY_CHANGE_ATTRIBUTES?|

FILE_NOTIFY_CHANGE_SIZE?|

FILE_NOTIFY_CHANGE_LAST_WRITE?|

FILE_NOTIFY_CHANGE_LAST_ACCESS?|

FILE_NOTIFY_CHANGE_CREATION?|

FILE_NOTIFY_CHANGE_SECURITY?|

FILE_NOTIFY_CHANGE_CEGETINFO????);if?(dwChangeHandles?==?INVALID_HANDLE_VALUE)?{

printf("\n?ERROR:?FindFirstChangeNotification?function?failed?[%d].\n",?GetLastError());

return;}while?(TRUE)?{

//?Wait?for?notification.

printf("\n\n[%d]?Waiting?for?notification...\n",?iCount);

iCount++;

dwWaitStatus?=?WaitForSingleObject(dwChangeHandles,?INFINITE);

switch?(dwWaitStatus)

{

case?WAIT_OBJECT_0:

printf(?"Change?detected\n"?);

DWORD?iBytesReturned,?iBytesAvaible;

if(?CeGetFileNotificationInfo(?dwChangeHandles,?0,?NULL,?0,?&iBytesReturned,?&iBytesAvaible)?!=?0?)

{

std::vector?vecBuffer(?iBytesAvaible?);

if(?CeGetFileNotificationInfo(?dwChangeHandles,?0,?&vecBuffer.front(),?vecBuffer.size(),?&iBytesReturned,?&iBytesAvaible)?!=?0?)?{

BYTE*?p_bCurrent?=?&vecBuffer.front();

PFILE_NOTIFY_INFORMATION?info?=?NULL;

do?{

info?=?reinterpret_cast(?p_bCurrent?);

p_bCurrent?+=?info->NextEntryOffset;

if(?wszFileNameToWatch.compare(?info->FileName?)?==?0?)

{

wcout?<FileName?<Action;

switch(info->Action)?{

case?FILE_ACTION_ADDED:

break;

case?FILE_ACTION_MODIFIED:

break;

case?FILE_ACTION_REMOVED:

break;

case?FILE_ACTION_RENAMED_NEW_NAME:

break;

case?FILE_ACTION_RENAMED_OLD_NAME:

break;

}

}

}while?(info->NextEntryOffset?!=?0);

}

}

if?(?FindNextChangeNotification(?dwChangeHandles?)?==?FALSE?)

{

printf("\n?ERROR:?FindNextChangeNotification?function?failed?[%d].\n",?GetLastError());

return;

}

break;

case?WAIT_TIMEOUT:

printf("\nNo?changes?in?the?timeout?period.\n");

break;

default:

printf("\n?ERROR:?Unhandled?dwWaitStatus?[%d].\n",?GetLastError());

return;

break;

}}FindCloseChangeNotification(?dwChangeHandles?);}

總結

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