#include <Array.au3>
Local $sText, $aRegExp
$sText = "{Char Nick Name 1} Hello, how are you? Whats up?" & @CRLF & _
"{Char Nick Name 2} Hello, how are you? Whats up?" & @CRLF & _
"{Char Nick Name 3} Hello, how are you? Whats up?" & @CRLF & _
"{Char Nick Name 4} Hello, how are you? Whats up?" & @CRLF & _
"{Char Nick Name 5} Hello, how are you? Whats up?"
$aRegExp = StringRegExp($sText, "{(.*?)}", 3)
MsgBox(0, "", _ArrayToString($aRegExp, @CRLF))