//when-new-form-instance

declare

errcode number;
group_id RecordGroup;
group_name varchar2(10) :='group_emp';

begin

group_id := find_group(group_name);
if not id_null(group_id) then
delete_group(group_id);
end if;

group_id := Create_Group_From_Query(group_name,'select TO_CHAR(id) from emp');

errcode := Populate_Group(group_id);
Populate_List('block.emp',group_id);

end ;