#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox
Local $sRegex = "(?m)^\[([^\]]+)\] \[(오[전후] \d{1,2}:\d{2})\] (.*)$"
Local $sString = "[철수] [오전 2:06] 메세지본문" & @CRLF & _
"위와 같은 문자열에서 사람이름, 시간, 메세지 본문을 따로 뽑아오고싶은데 정규표현식을 제대로 다뤄본적이 없어 고전중입니다 ㅠㅠ"
Local $sSubst = "$3 - $2, $1"
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