#include <StringConstants.au3> ; to declare the Constants of StringRegExp
#include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate
Local $sRegex = "2845CT;([^,]+)"
Local $sString = "2810X000000466,,APQ4LA805C34REUGJU,2845AP;2810X000000467,,4985,2845ER;2810X000000468,,361301760100,2845CT;2810X000000469,,DV361301760100,2845NC;2810X000000470,,APQ4LA805C34REUGJU,2845NA;2810X000189003,,BC,2845PS;2810X000267245,,E00137336,2845OA;2810X000267246,,E01027004,2845LS;2810X000267247,,E02005628,2845MS;2810X000331704,,C,284599;2810X000384460,,01/04/1993,284591"
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