vb6 GetFileTime,SetFileTime by Windows api
When converting UTC time to Beijing time, an additional 8 hours are required.
Code:
Sub Test()
SetFileTimes App.Path & "\test.txt", "2025-2-1", "2025-2-2 11:11:11", "2025-2-3 12:13:14"
Dim CreationTime As Date, LastAccessTime As Date, LastWriteTime As Date
GetFileTimes App.Path & "\test.txt", CreationTime, LastAccessTime, LastWriteTime
Debug.Print "readFileTime:CreationTime=" & CreationTime & ",LastAccessTime=" & LastAccessTime & ",LastWriteTime=" & LastWriteTime
End Sub
Code:
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 Declare Function FileTimeToSystemTime Lib "kernel32" (lpFileTime As FILETIME, lpSystemTime As SYSTEMTIME) 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 SetFileTime Lib "kernel32" (ByVal hFile As Long, lpCreationTime As FILETIME, lpLastAccessTime As FILETIME, lpLastWriteTime 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 SystemTimeToFileTime Lib "kernel32" (lpSystemTime As SYSTEMTIME, lpFileTime As FILETIME) As Long
Private Declare Function LocalFileTimeToFileTime Lib "kernel32" (lpLocalFileTime As FILETIME, lpFileTime As FILETIME) As Long
Private Const GENERIC_WRITE = &H40000000
Private Const OPEN_EXISTING = 3
Private Const FILE_SHARE_READ = &H1
Private Const FILE_SHARE_WRITE = &H2
Public Function SystemTimeToDate(st As SYSTEMTIME, Optional TimeZone As Long = 8) As Date
'?????SYSTEMTIME?Date
Dim dt As Date
dt = DateAdd("h", TimeZone, DateSerial(st.wYear, st.wMonth, st.wDay) + _
TimeSerial(st.wHour, st.wMinute, st.wSecond))
SystemTimeToDate = dt
End Function
Public Function GetFileTimes(ByVal filePath As String, Optional CreationTime As Date _
, Optional LastAccessTime As Date, Optional LastWriteTime As Date, Optional TimeZone As Long = 8) As Date
Dim hFile As Long
Dim ftCreation As FILETIME
Dim ftLastAccess As FILETIME
Dim ftLastWrite As FILETIME
Dim st As SYSTEMTIME
hFile = CreateFile(filePath, GENERIC_WRITE, FILE_SHARE_READ Or FILE_SHARE_WRITE, 0, OPEN_EXISTING, 0, 0)
If hFile = -1 Then
Exit Function
End If
GetFileTime hFile, ftCreation, ftLastAccess, ftLastWrite
FileTimeToSystemTime ftCreation, st: CreationTime = SystemTimeToDate(st, TimeZone)
FileTimeToSystemTime ftLastAccess, st: LastAccessTime = SystemTimeToDate(st, TimeZone)
FileTimeToSystemTime ftLastWrite, st: LastWriteTime = SystemTimeToDate(st, TimeZone)
CloseHandle hFile
GetFileTimes = LastWriteTime
End Function
Public Function SetFileTimes(ByVal filePath As String, Optional ByVal CreationTime As Date _
, Optional ByVal LastAccessTime As Date, Optional ByVal LastWriteTime As Date, Optional TimeZone As Long = 8) As Boolean
'TimeZone=8 china/beijing
Dim hFile As Long
Dim ftCreation As FILETIME
Dim ftLastAccess As FILETIME
Dim ftLastWrite As FILETIME
Dim st As SYSTEMTIME
' ??????
hFile = CreateFile(filePath, GENERIC_WRITE, FILE_SHARE_READ Or FILE_SHARE_WRITE, 0, OPEN_EXISTING, 0, 0)
If hFile = -1 Then
Exit Function
End If
If CreationTime <> 0 Then
' ?????FILETIME??
With st
.wYear = Year(CreationTime)
.wMonth = Month(CreationTime)
.wDay = Day(CreationTime)
.wHour = Hour(CreationTime)
.wMinute = Minute(CreationTime)
.wSecond = Second(CreationTime)
End With
Call SystemTimeToFileTime(st, ftCreation)
Call LocalFileTimeToFileTime(ftCreation, ftCreation)
End If
If LastAccessTime <> 0 Then
With st
.wYear = Year(LastAccessTime)
.wMonth = Month(LastAccessTime)
.wDay = Day(LastAccessTime)
.wHour = Hour(LastAccessTime)
.wMinute = Minute(LastAccessTime)
.wSecond = Second(LastAccessTime)
End With
Call SystemTimeToFileTime(st, ftLastAccess)
Call LocalFileTimeToFileTime(ftLastAccess, ftLastAccess)
End If
If LastWriteTime <> 0 Then
With st
.wYear = Year(LastWriteTime)
.wMonth = Month(LastWriteTime)
.wDay = Day(LastWriteTime)
.wHour = Hour(LastWriteTime)
.wMinute = Minute(LastWriteTime)
.wSecond = Second(LastWriteTime)
End With
Call SystemTimeToFileTime(st, ftLastWrite)
Call LocalFileTimeToFileTime(ftLastWrite, ftLastWrite)
End If
Call SetFileTime(hFile, ftCreation, ftLastAccess, ftLastWrite)
Call CloseHandle(hFile)
SetFileTimes = True
End Function
Re: vb6 GetFileTime,SetFileTime by Windows api
Code:
Private Function FileTimeToDate(FT As FILETIME, Optional TimeZone As Long = 8) As Date
Dim st As SYSTEMTIME
FileTimeToSystemTime FT, st
FileTimeToDate = DateAdd("h", TimeZone, DateSerial(st.wYear, st.wMonth, st.wDay) + _
TimeSerial(st.wHour, st.wMinute, st.wSecond))
End Function
Public Function GetFileTimes(ByVal filePath As String, Optional CreationTime As Date _
, Optional LastAccessTime As Date, Optional LastWriteTime As Date, Optional TimeZone As Long = 8) As Date
Dim hFile As Long
Dim ftCreation As FILETIME, ftLastAccess As FILETIME, ftLastWrite As FILETIME
hFile = CreateFile(filePath, GENERIC_WRITE, FILE_SHARE_READ Or FILE_SHARE_WRITE, 0, OPEN_EXISTING, 0, 0)
If hFile = -1 Then Exit Function
GetFileTime hFile, ftCreation, ftLastAccess, ftLastWrite
CreationTime = FileTimeToDate(ftCreation, TimeZone)
LastAccessTime = FileTimeToDate(ftLastAccess, TimeZone)
LastWriteTime = FileTimeToDate(ftLastWrite, TimeZone)
CloseHandle hFile: GetFileTimes = LastWriteTime
End Function
