how to populate dropdown list name

Hello all....

            How can i populate dropdown list name associated to the field.

            Suppose I have Module A and Module B in which Module A have multiple fileds and Module B have only one field. When I entered display label name to Module B which is dropdown field in Module save i want to populate Dropdown name associated to entered lable name. means when I entered "status" in field of Module B then i want to populate dropdownlist name associated with "status" which is like "status_list"

please help me.....

thanks in advanced

Tejas Kulkarni