Function Module for fnding all employees under an Org Unit

Hi,

Is there any Function module to find the employees of an ORG Unit .

I need to specify the Org unit Name and get the employees out of it .

I looked at the FM

HRCM_ORGUNIT_EMPLOYEE_LIST_GET .

It has import parameters as

OTYP

OBJID

PATH_ID

What values do i need to pass.