Speed optimization of latest Nine's code:
 
	In StringInStr() and StringReplace() use CaseSense=1, this is MUCH faster
 
	orig:
 
Func _TabsToSpaces($sString, $iTabLen = 8)
  Local $iMod, $iSpaceLeft
  Local $iTabPos = StringInStr($sString, @TAB)
  While $iTabPos
    $iMod = Mod($iTabPos, $iTabLen)
    $iSpaceLeft = $iMod ? $iTabLen - $iMod : 0
    $sString = StringReplace($sString, Chr(9), _StringRepeat(" ", $iSpaceLeft + 1), 1)
    $iTabPos = StringInStr($sString, @TAB)
  WEnd
  Return $sString
EndFunc   ;==>_TabsToSpaces
	optimised:
 
Func _TabsToSpaces($sString, $iTabLen = 8)
  Local $iMod, $iSpaceLeft
  Local $iTabPos = StringInStr($sString, @TAB, 1)
  While $iTabPos
    $iMod = Mod($iTabPos, $iTabLen)
    $iSpaceLeft = $iMod ? $iTabLen - $iMod : 0
    $sString = StringReplace($sString, Chr(9), _StringRepeat(" ", $iSpaceLeft + 1), 1, 1)
    $iTabPos = StringInStr($sString, @TAB, 1)
  WEnd
  Return $sString
EndFunc   ;==>_TabsToSpaces