Blackmore,
Define an edit control like this
$e1 = GUICtrlCreateEdit("", 50, 120, @DesktopWidth - 150, 400, $ES_AUTOVSCROLL + $WS_VSCROLL + $ws_hscroll + $es_readonly) GUICtrlSetLimit($s1, 1000000) ; 1 million byte edit char limit
and populate it like this
GUICtrlSetData($e1, _Now() & " " & $some_string & @CRLF, 1)
kylomas
edit: the _now() is just how I do date/time stams, use whatever you like