There are 3 function calls how to open the edior from DLL:
1.
procedure ShowEditor(AUserName:PChar); stdcall;
This function is supported by all windows programming languages.
Just pass default username, or real username if your system is a multiuser sytem, so each user can have its own setings saved. This parameter is of PChar type, or Null-Terminated string. From Visual Fox, just pass string (probably VB too).