Visual Basic Programming Code Examples

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Returning a files creation time



Returning a files creation time

The following function returns the creation time of a file:

Option Explicit

Private Declare Function FileTimeToSystemTime Lib "kernel32" (lpFileTime As FILETIME, lpSystemTime As SYSTEMTIME) As Long
Private Declare Function FileTimeToLocalFileTime Lib "kernel32" (lpFileTime As FILETIME, lpLocalFileTime As FILETIME) As Long
Private Declare Function GetFileTime Lib "kernel32" (ByVal hFile As Long, lpCreationTime As FILETIME, lpLastAccessTime As FILETIME, lpLastWriteTime As FILETIME) As Long
Private Declare Function OpenFile Lib "kernel32" (ByVal lpFileName As String, lpReOpenBuff As OFSTRUCT, ByVal wStyle As Long) As Long
Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long

Private Const MaxPathName = 256

Private Type OFSTRUCT
    cBytes As Byte
    fFixedDisk As Byte
    nErrCode As Integer
    Reserved1 As Integer
    Reserved2 As Integer
    szPathName(MaxPathName) As Byte
End Type

Private Type FILETIME
    LowDateTime As Long
    HighDateTime As Long
End Type

Private Type SYSTEMTIME
    Year As Integer
    Month As Integer
    DayOfWeek As Integer
    Day As Integer
    Hour As Integer
    Minute As Integer
    Second As Integer
    Milliseconds As Integer
End Type


'Purpose   :    Returns the file creation time for a specified file.
'Inputs    :    sPathFileName           The path and file name of the file.
'Outputs   :    Returns the file creation time of the specified file,
'               or returns -1 (29/12/1899) if an error occurred.


Function FileCreationTime(sPathFileName As String) As Date
    Dim lHFile As Long, lRetVal As Long
    Dim tCreationTime As FILETIME, tLassAccessTime As FILETIME, tOFS As OFSTRUCT
    Dim tLastWriteTime As FILETIME, tSysTime As SYSTEMTIME, tCreationTimeLocal As FILETIME
    Const clOfRead = &H0

    On Error Resume Next
    tOFS.cBytes = Len(tOFS)
    lHFile = OpenFile(sPathFileName, tOFS, clOfRead)
    If lHFile Then
        lRetVal = GetFileTime(lHFile, tCreationTime, tLassAccessTime, tLastWriteTime)
        lRetVal = FileTimeToLocalFileTime(tCreationTime, tCreationTimeLocal)
        lRetVal = FileTimeToSystemTime(tCreationTimeLocal, tSysTime)
        FileCreationTime = DateSerial(tSysTime.Year, tSysTime.Month, tSysTime.Day) + TimeSerial(tSysTime.Hour, tSysTime.Minute, tSysTime.Second)
        lRetVal = CloseHandle(lHFile)
    End If
    If Err.LastDllError Then
        'An error occurred (check if file is missing)
        Debug.Print "Error in FileCreationTime. Error " & Err.LastDllError & " (check the file exists)."
        FileCreationTime = -1
    End If
    On Error GoTo 0
End Function