#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox
Local $sRegex = "(?m)\\(\w)*\\"
Local $sString = "D:\pcap\WebMail" & @CRLF & _
"D:\pcap1\WebMail\1\1" & @CRLF & _
"C:\pcap\WebMail\sd\" & @CRLF & _
"D:\pcapFixed\WebMail\AOL\AOL_Accessible\20121107\AOL_lite_ACCESSIBLE_001_Login.xml"
Local $sSubst = "\\replacedFolder\\"
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