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Visual Basic / File & Disk Operations / Using SetFile Time

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ID: 336

Viewed: 1291

Added: 2002-08-19

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The Win32 API includes native functions that
allow you To change a file's properties, such as time and date, without a
third-party DLL.

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Declarations
Highlight AllOption Explicit ' Private Type FILETIME dwLowDate As Long dwHighDate As Long End Type Private Type SYSTEMTIME wYear As Integer wMonth As Integer wDayOfWeek As Integer wDay As Integer wHour As Integer wMinute As Integer wSecond As Integer wMillisecs As Integer End Type Private Const FILE_SHARE_READ = &H1 Private Const FILE_SHARE_WRITE = &H2 Private Const GENERIC_WRITE = &H40000000 Private Const OPEN_EXISTING = 3 Private Declare Function CloseHandle Lib "kernel32" _ (ByVal hObject As Long) As Long Private Declare Function CreateFile Lib "kernel32" _ Alias "CreateFileA" (ByVal lpFileName As String, _ ByVal dwDesiredAccess As Long, ByVal dwShareMode _ As Long, ByVal lpSecurityAttributes As Long, ByVal _ dwCreationDisposition As Long, ByVal _ dwFlagsAndAttributes As Long, ByVal hTemplateFile _ As Long) As Long Private Declare Function LocalFileTimeToFileTime Lib _ "kernel32" (lpLocalFileTime As FILETIME, lpFileTime _ As FILETIME) As Long Private Declare Function SetFileTime Lib "kernel32" _ (ByVal hFile As Long, ByVal MullP As Long, ByVal _ NullP2 As Long, lpLastWriteTime As FILETIME) As Long Private Declare Function SystemTimeToFileTime Lib _ "kernel32" (lpSystemTime As SYSTEMTIME, lpFileTime _ As FILETIME) As Long
Code
Highlight AllSub Main() Call SetFileDate("c:autoexec.bat", "10/16/96 12:30 pm") End Sub Sub SetFileDate(sFileName As String, sDate As String) Dim hFile As Long Dim lResult As Long Dim udtSysTime As SYSTEMTIME Dim udtFileTime As FILETIME Dim udtLocalTime As FILETIME With udtSysTime .wYear = Year(sDate) .wMonth = Month(sDate) .wDay = Day(sDate) .wDayOfWeek = WeekDay(sDate) - 1 .wHour = Hour(sDate) .wMinute = Minute(sDate) .wSecond = Second(sDate) End With lResult = SystemTimeToFileTime(udtSysTime, _ udtLocalTime) lResult = LocalFileTimeToFileTime(udtLocalTime, _ udtFileTime) hFile = CreateFile(sFileName, GENERIC_WRITE, _ FILE_SHARE_READ _ Or FILE_SHARE_WRITE, ByVal 0&, OPEN_EXISTING, _ 0, 0) lResult = SetFileTime(hFile, ByVal 0&, ByVal 0&, _ udtFileTime) Call CloseHandle(hFile) End Sub

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