>I tried tools -> Code Reference, before I posted my question. But all it finds is the .vcx library where the control My_combo resides.
>

Try using some code like this. With the project open:

FOR EACH oFile in _VFP.ActiveProject
  IF oFile.Type = "K" && form
     USE (oFile.Name) ALIAS __FORM
     SCAN FOR __FORM.Class = m.cSpecifiedClass
         * Do something
     ENDSCAN

     USE IN (__FORM)
  ENDIF
ENDFOR

Tamar

P.S. Do you mind if I use this question and your name for the Advisor Answers column?