| 术语 | unlockfileex |
| 释义 | UnlockFileEx 语法： C++ BOOL WINAPI UnlockFileEx( __in HANDLE hFile, __reserved DWORD dwReserved, __in DWORD nNumberOfBytesToUnlockLow, __in DWORD nNumberOfBytesToUnlockHigh, __inout LPOVERLAPPED lpOverlapped ); UnlockFileEx功能 解锁一个指定的文件区域。这个功能可以操作同步或异步。 参数 hFile [in] 阿处理该文件。在处理时一定是要么GENERIC_READ或GENERIC_WRITE访问权限创建。有关更多信息，请参阅文件安全性和访问权限。 dwReserved 保留参数，必须为零。 nNumberOfBytesToUnlockLow [in] 的低字节的范围长度秩序的一部分来解锁。 nNumberOfBytesToUnlockHigh [in] 的高字节的范围长度秩序的一部分来解锁。 lpOverlapped [ in , out ] 与开锁请求指针，指向一个OVERLAPPED结构的函数使用。这个结构包含了解锁范围的开始抵消文件。您必须初始化hEvent成员有效的处理或零。有关更多信息，请参阅同步和异步I / O。 返回值 如果函数成功，返回值为非零。 如果函数失败，返回值为零或NULL。为了获得更多错误信息，调用GetLastError。 备注 解锁一个文件的一个地区发行的文件先前获得的锁。该地区解锁必须完全一致，因此现有的锁定区域。一个文件的两个邻近地区无法锁定，然后锁定单独使用一个地区横跨内陆地区。 锁CloseHandle函数之前释放处理完了。 要求： 最低支持：client－Windows 2000专业版 最低支持server－Windows 2000服务器 HeaderWinBase.h(头文件：winuser.h) LibraryKernel32.lib DLLKernel32.dll 参见 CreateFile 文件管理函数 取决于LockFile LockFileEx 的OVERLAPPED 同步和异步I / O UnlockFile 如果有任何问题和意见，请发送给微软(wsddocfb@microsoft.com) 生成日期：2009年9月3日 ＝＝英文原文＝＝UnlockFileEx Function Unlocks a region in the specified file. This function can operate either synchronously or asynchronously. Syntax C++ BOOL WINAPI UnlockFileEx( __in HANDLE hFile, __reserved DWORD dwReserved, __in DWORD nNumberOfBytesToUnlockLow, __in DWORD nNumberOfBytesToUnlockHigh, __inout LPOVERLAPPED lpOverlapped ); Parameters hFile [in] A handle to the file. The handle must have been created with either the GENERIC_READ or GENERIC_WRITE access right. For more information, see File Security and Access Rights . dwReserved Reserved parameter; must be zero. nNumberOfBytesToUnlockLow [in] The low-order part of the length of the byte range to unlock. nNumberOfBytesToUnlockHigh [in] The high-order part of the length of the byte range to unlock. lpOverlapped [in, out] A pointer to an OVERLAPPED structure that the function uses with the unlocking request. This structure contains the file offset of the beginning of the unlock range. You must initialize the hEvent member to a valid handle or zero. For more information, see Synchronous and Asynchronous I/O . Return Value If the function succeeds, the return value is nonzero. If the function fails, the return value is zero or NULL. To get extended error information, call GetLastError . Remarks Unlocking a region of a file releases a previously acquired lock on the file. The region to unlock must correspond exactly to an existing locked region. Two adjacent regions of a file cannot be locked separately and then unlocked using a single region that spans both locked regions. Locks are released before the CloseHandle function is finished processing. Requirements Minimum supported clientWindows 2000 Professional Minimum supported serverWindows 2000 Server HeaderWinBase.h (include Windows.h) LibraryKernel32.lib DLLKernel32.dll See Also CreateFile File Management Functions LockFile LockFileEx OVERLAPPED Synchronous and Asynchronous I/O UnlockFile Send comments about this topic to Microsoft Build date: 9/3/2009 ＝＝原始网址＝＝http://msdn.microsoft.com/en-us/library/aa365716(VS.85).aspx\n |
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