How to Copy a Sales order from backend

Following is the piece of code to copy a Sales order from backend

declare

        l_return_status               varchar2(1);

        l_order_number_from           number :=XYZ; -- Sample order

        l_order_source_id             number :=1041;

begin

        oe_debug_pub.debug_on;

        oe_debug_pub.initialize;

        oe_debug_pub.add('Before oe_inf_populate_pub call',1);

        oe_inf_populate_pub.populate_interface ( p_api_version_number   => 1.0 , x_return_status    => l_return_status ,

                                                 p_order_number_from   => l_order_number_from ,  p_order_source_id         => l_order_source_id );

        oe_debug_pub.add('Before oe_inf_populate_pub call',1);

end;