#include <StringConstants.au3> ; to declare the Constants of StringRegExp
#include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate
Local $sRegex = "\((.*)\)"
Local $sString = "1. ('1KtxNawkosV1H5jzUzW_$1'),#38,'2ndLevel', '2a',#251524,#251773,#328411,.PHYSICAL.,.EXTERNAL." & @CRLF & _
"" & @CRLF & _
"2. '1KtxNawkosV1H5jzUzW_$1',#38,'2ndLevel', '2a',#251524,#251773,(#328411,.PHYSICAL.,.EXTERNAL.)" & @CRLF & _
"" & @CRLF & _
"3. ('1KtxNawkos(asd)V1H5jzU)zW_$1', ('asd', #23331), #21)<-- ###should end here###,#38,'2ndLevel', '2a',#251524,#251773,#328411,.PHYSIaCAL.,.EXTERNAL., ')'" & @CRLF & _
"" & @CRLF & _
"4. #38,'2ndLevel',('1KtxNawkos(asd)V1H5jzU)zW_$1') '2a',#251524,#251773,#328411,.PHYSICAL.,.EXTERNAL." & @CRLF & _
""
Local $aArray = StringRegExp($sString, $sRegex, $STR_REGEXPARRAYGLOBALFULLMATCH)
Local $aFullArray[0]
For $i = 0 To UBound($aArray) -1
_ArrayConcatenate($aFullArray, $aArray[$i])
Next
$aArray = $aFullArray
; Present the entire match result
_ArrayDisplay($aArray, "Result")
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm