how to put as a item in dropdownlist at run time

Hi masters

I have one dropdownlist which is getting data from database at rumtime.here is the query....

RStoCombo("select department_name,department_code from departments order by department_name", 0, 1, txddlist, "")

this is getting data suppose: Mike, Tom, etc ...

I just want to insert one item like -----select name ------- then mike, tom...

how to acheive this because.......this is getting data at run time.

plz guys help me