Use the examples to create function strings.
create function string rs_begin for gateway_func_class output rpc 'execute begin_xact'
create function string publishers_rep.rs_insert for function class rs_sqlserver_function_class output rpc 'execute insert_publisher @pub_id = ?pub_id!new?, @pub_name = ?pub_name!new?, @city = ?city!new?, @state = ?state!new?'
create function string upd_bits.upd_bits for database NY_DS.rdb1 with overwrite output language 'exec upd_bits @firstbit = ?firstbit!param?, @secondbit = ?secondbit!param?, @commit = ?comment!param?'