using return parameter from stored procedure in PIA

Hello folks,

I have My stored procedure named as  customer_insert in which i am inserting a record and from same stored procedure i am returning 1 output parameter , @customerid , with 3 input parameter @companyname, @country,@city ,
now i want it to make it   @customerid as from code as   direction.output and get its value in db.cs or in SqlServerCustomerDao.cs 

how could i do that