void Sats3::DoDrops() {

  static const ...FromType.. _from[] = {Generation, EdCode, Sex, Race, ..., Area};
  static const ...ControlTypePtr... _ctrl[] = {ist.dGen, ist.dEdCode, ..., mis.txtOpsArea};
//all controls must be derived from the same "..ControlType..."
//and implement virtual "Add" function with same interface

    for (int i = 0; i < sizeof(_from)/sizeof(...FromType..); ++i )
    {
	SQL*Select(Code).From(_from[i]);
	while(SQL.Fetch())
		_ctrl[i]->Add(SQL[0]);
    }

}