How to create function module for getting customer name

Question

Hi Experts,
               How to create function module?  when in import parameter kunnr values to be passed it must give name1 details according to the customer number...
how to write the logic in source code....
Regards,
Thiru. R

Answer 1

1. First of all create function group.
2. Create function module using this function group.
3. If only one kunnr is needed at a time, create import parameter for it. But if many kunnr to be entered at a time,use table.
4. Fetch name1 for each kunnr from KNA1 table.
"->> if many kunnr
if not t_kunnr[] is initial.
select kunnr as kunnr name1 as name1
into table t_kunnr_name1
from kna1
for all entried in table t_kunnr
where kunnr = t_kunnr-kunnr.
endif.       
sort t_kunnr_name1 by kunnr name1.
delete adjacent duplicates from t_kunnr_name1 comparing kunnr name1.
table t_kunnr_name1 will contain kunnr and its name1.
I hope logic is clear for you now.
Regards,
Aparna