Propably not an absolute clean approach, (not checking/caring about little / big endian), but it's doing, what I need: Return the last modified time stamp including the milliseconds:
#include <Date.au3> $file = "c:\temp\test.txt" ; file must already exist $TSLastModMs = GetFileLastModWithMs($file) ConsoleWrite('@@ Debug(' & @ScriptLineNumber & ') : $TSLastModMs = ' & $TSLastModMs & @CRLF & '>Error code: ' & @error & @CRLF) ;### Debug Console Func GetFileLastModWithMs($_FullFilePathName) local $h = _WinAPI_CreateFile($_FullFilePathName, 2, 2) local $aTS = _Date_Time_GetFileTime($h) _WinAPI_CloseHandle($h) local $aDate = _Date_Time_FileTimeToArray($aTS) ;  = LastModified Return StringFormat("%04d-%02d-%02d %02d:%02d:%02d.%03d", $aDate, $aDate, $aDate, $aDate, $aDate, $aDate, $aDate) EndFunc ;==>GetFileLastModWithMs >Running AU3Check (184.108.40.206) from:C:\Program Files (x86)\AutoIt3 input:C:\temp\filetime.au3 +>12:10:00 AU3Check ended.rc:0 >Running:(220.127.116.11):C:\Program Files (x86)\AutoIt3\autoit3.exe "C:\temp\filetime.au3" --> Press Ctrl+Alt+Break to Restart or Ctrl+Break to Stop @@ Debug(8) : $TSLastModMs = 2018-09-07 10:09:54.073 >Error code: 0 +>12:10:00 AutoIt3.exe ended.rc:0 +>12:10:00 AutoIt3Wrapper Finished. >Exit code: 0 Time: 0.9068 Regards, Rudi.
--- original posting - what was my problem, below ---
doing some search I found postings, stating that 2s will be the smallest time resolution for filegettime(). 2s seem to be fact for FAT as FS, NTFS has a much finer granularity.
This posting states, that NTFS has a granularity of 100ns:
is it possible to get more than just the "second" information? The reason, why I need this is, that I need to sort files by their creation sequence, and it can happen, that two files are created within the same second, so I cannot resolve their creation order without "millsecond info".
edit: I just tried PowerShell, there it's possible to retrieve even more than millisecond information:
Millisecond : 336
Ticks : 636719150403363219
TimeOfDay : 11:04:00.3363219
PS C:\Users\Rudi> echo test > test.txt PS C:\Users\Rudi> $(Get-ChildItem .\test.txt).creationtime | format-list Date : 07.09.2018 00:00:00 Day : 7 DayOfWeek : Friday DayOfYear : 250 Hour : 11 Kind : Local Millisecond : 336 Minute : 4 Month : 9 Second : 0 Ticks : 636719150403363219 TimeOfDay : 11:04:00.3363219 Year : 2018 DateTime : Freitag, 7. September 2018 11:04:00 regards, Rudi.