function Get-NtpTimeByW32tm {
# A function get time from ntpserver via w32tm command
  param([string]$NtpServer)
  $ret = & cmd /c "w32tm /stripchart /computer:$($ntpserver) /samples:1 /dataonly"
  $localTime = $ret | Select-String "現在の時刻は "
  $localTime = $localTime -Replace "現在の時刻は ", ""
  $localTime = $localTime -Replace " です。", ""
  $diffSec = $ret | Select-String -Pattern '([-+]?\d+\.\d+)s$'
  if ($diffSec -and $diffSec.Matches.Count -gt 0) {
    $offset = [double]$diffSec.Matches[0].Groups[1].Value
    return ([datetime]$localtime).AddSeconds($offset)
$offset
  } else {
    return "Error: w32tm error"
  }
}
# End of Get-NtpTimeByW32tm function
# Usage Examples
Get-NtpTimeByW32tm -NtpServer "time.windows.com"