type
      TFieldRec=record      
          Caption:string;
          FieldName:string;
      end;
      TFieldsRec= array of TFieldRec;...
    FFields: TFieldsRec;
...procedure a();
var
  Edt:TFrmDetailJy;
begin
  try
   Edt:=FrmDetailJy.Create(self);
   Edt.FFields:=FFields;
   Edt.ShowModal;
   //这里可以直接访问修改后的FFields吗?在Edt操作后的结果会不会得到???
  finally
    Edt.free;
  end;
end;