UnlockFileEx

UnlockFileEx

VB聲明

Declare Function UnlockFileEx Lib "kernel32" Alias "UnlockFileEx" (ByVal hFile As Long, ByVal dwReserved As Long, ByVal nNumberOfBytesToUnlockLow As Long, ByVal nNumberOfBytesToUnlockHigh As Long, lpOverlapped As OVERLAPPED) As Long

說明

解除對一個文件的鎖定

返回值

Long，非零表示成功，零表示失敗。會設(shè)置GetLastError

參數(shù)表

參數(shù)

類型及說明

hFile

Long，要解鎖的文件的句柄

dwReserved

Long，未用；設(shè)為零

nNumberOfBytesToUnlockLow

Long，鎖定區(qū)域中字符數(shù)量的低32位值

nNumberOfBytesToUnlockHigh

Long，鎖定區(qū)域中字符數(shù)量的高32位值

lpOverlapped

OVERLAPPED，包含了文件中相對于解鎖區(qū)域起始處的偏移量

注解

解鎖的文件區(qū)域必須與以前鎖定時設(shè)置的區(qū)域完全相符。文件關(guān)閉前，應(yīng)用程序應(yīng)確定已解除了對任何區(qū)域的鎖定。參考LockFileEx了解進一步的情況

Top