#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox
Local $sRegex = "(?mi)[0-2]\b"
Local $sString = "720" & @CRLF & _
"721" & @CRLF & _
"722" & @CRLF & _
"723" & @CRLF & _
"724" & @CRLF & _
"725" & @CRLF & _
"726" & @CRLF & _
"727" & @CRLF & _
"728" & @CRLF & _
"729" & @CRLF & _
"730" & @CRLF & _
"504" & @CRLF & _
"507" & @CRLF & _
"1 CZK" & @CRLF & _
"4 CZK" & @CRLF & _
"5 CZK" & @CRLF & _
"9 CZK"
Local $sSubst = "0"
Local $sResult = StringRegExpReplace($sString, $sRegex, $sSubst)
MsgBox($MB_SYSTEMMODAL, "Result", $sResult)
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