https://bugs.winehq.org/show_bug.cgi?id=48559
--- Comment #11 from Rafał Mużyło galtgendo@o2.pl --- I can't say I really understand the question from mr4682, but my 'msg' LB_ADDSTRING content were lines like:
msg:WINPROC_CallProcAtoW (hwnd=00010072,msg=LB_ADDSTRING,wp=00000000,lp=1a4915c4)
If clarification needed, ask a more detailed question.