dynamically generate the list in oracle

FIRST CREATE A LIST_ITEM EMPLOYEE_CODE IN THE EMPLOYEE_MASTER BLOCK.TO FILL THE LIST WITH VALUES RUNTIME USE THE FOLLOWING CODE:-

declare
 
  r_dname varchar2(40) := 'divn_rec';
  status number;
  groupidd recordgroup;
begin

/*First dynamically create a query*/

groupidd := create_group_from_query(R_dname,
  'select employee_NAME,employee_code  from emp');

/* tHEN POPULATE THE FROUP*/
  status := populate_group(groupidd);
  clear_list('EMPLOYEE_MASTER.EMPLOYEE_CODE');
/** populates the list with values from record group*/
  populate_list('EMPLOYEE_MASTER.EMPLOYEE_CODE',groupidd);
END ;