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Thread: how to manipulage the file creation dates?

  1. #1
    Guest

    Question

    I want to change/modify the file creation/modified date of a (any) file. I want the sufficient API to change the file creation/modified time. I tried to do that using GetFileTime/SetFileTime win32-api functions. Can any body help me? If so, please give me the demo code using the necessary API calls.


  2. #2
    Guest
    Here is the code to change a file's date:

    Code:
    Option Explicit
     
    Private Type FILETIME
        dwLowDateTime As Long
        dwHighDateTime 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
        wMilliseconds As Integer
    End Type
    
    Private Const GENERIC_WRITE = &H40000000
    Private Const OPEN_EXISTING = 3
    Private Const FILE_SHARE_READ = &H1
    Private Const FILE_SHARE_WRITE = &H2
    
    Private Declare Function SetFileTimeWrite Lib "kernel32" Alias "SetFileTime" (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
    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 CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
    Private Declare Function LocalFileTimeToFileTime Lib "kernel32" (lpLocalFileTime As FILETIME, lpFileTime As FILETIME) As Long
    
    Private Sub Command1_Click()
        Dim year As Integer, Month As Integer
        Dim Day As Integer, Hour As Integer
        Dim Minute As Integer, Second As Integer
        Dim TimeStamp As Variant
        Dim Filename As String
        Dim X As Integer
        Dim i As Integer
        
        
          year = Format(Date, "yyyy")
          Month = Format(Date, "mm")
          Day = Format(Date, "dd")
          Hour = Format(Time, "hh")
          Minute = Format(Time, "nn")
          Second = Format(Time, "ss")
      
        
        TimeStamp = DateSerial(year, Month, Day) + TimeSerial(Hour, Minute, Second)
      
          X = ModifyFileStamp(Filename, TimeStamp)
     
    End Sub
    
    Function ModifyFileStamp(Filename As String, TimeStamp As Variant) As Integer
        Dim X As Long
        Dim Handle As Long
        Dim System_Time As SYSTEMTIME
        Dim File_Time As FILETIME
        Dim Local_Time As FILETIME
    
        System_Time.wYear = year(TimeStamp)
        System_Time.wMonth = Month(TimeStamp)
        System_Time.wDay = Day(TimeStamp)
        System_Time.wDayOfWeek = Weekday(TimeStamp) - 1
        System_Time.wHour = Hour(TimeStamp)
        System_Time.wMinute = Minute(TimeStamp)
        System_Time.wSecond = Second(TimeStamp)
        System_Time.wMilliseconds = 0
    
        'convert the system time to a file time
        X = SystemTimeToFileTime(System_Time, Local_Time)
    
        'convert local file time to file time based on UTC
        X = LocalFileTimeToFileTime(Local_Time, File_Time)
    
        'open the file so we can get a file handle to the file
        Handle = CreateFile(Filename, GENERIC_WRITE, FILE_SHARE_READ Or FILE_SHARE_WRITE, ByVal 0&, OPEN_EXISTING, 0, 0)
    
        'now change the file time and date stamp
        X = SetFileTimeWrite(Handle, ByVal 0&, ByVal 0&, File_Time)
        CloseHandle Handle
    
    End Function

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