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For my application, I have one string that may contain as item pointers a "space + single character/number + )" For example: Some text. 1) blah 2) blah a) yes b) no. I'd like this to become: Some text. (1) blah (2) blah (a) yes (b) no. It seems I understand the use of the back reference $1, but I may not be grasping the functionality of non-capturing groups... I hoped I could use the latter functionality so in the MAIN CODE I would not get the space between '(' and $1 The first code line below now giving me: Some text. ( 1) blah ( 2) blah ( a) yes ( b) no. Local $sOutput = StringRegExpReplace($sInput, '((?:\s).\))', ' ($1' ) As another trial, this doesn't seem to work either: Local $sOutput = StringRegExpReplace($sInput, '(\s.\))', ' (' & StringRight('$1', 2) ) MAIN CODE: Test() Func Test() Local $sInput = 'Some text. 1) blah 2) blah a) yes b) no.' ; look for 'space + any char + )' and put '(' in front Local $sOutput = StringRegExpReplace($sInput, '( (?:\s).\) )' , ' ($1' ) Display($sInput, $sOutput) EndFunc ;==>Test Func Display($sInput, $sOutput) ; Format the output. Local $sMsg = StringFormat("Input:\t%s\n\nOutput:\t%s", $sInput, $sOutput) MsgBox(0, "Results", $sMsg) EndFunc ;==>Display Thank you for any pointers