#include <Array.au3>
$b = _GetMACAddress()
_ArrayDisplay($B)

Func _GetMACAddress()
    local $sText, $iPID
    $iPID = Run(@ComSpec & " /c ipconfig /all", '', @SW_HIDE, 6)
    While 1
        $sText &= StdoutRead($iPID)
        If @error Then ExitLoop
    WEnd
    Return StringRegExp($sText, "(?s)(?i)([\w|\d]{2}\-[\w|\d]{2}\-[\w|\d]{2}\-[\w|\d]{2}\-[\w|\d]{2}\-[\w|\d]{2})", 3)
EndFunc