How to call method of Component A in Component B

Hi Friends,
I want to use Method A of Component A in Component B. Can some one tell me how to call method A on action of a button in component B.
Regards
Sankar

Hi,
  DATA lo_cmp_usage TYPE REF TO if_wd_component_usage.
  lo_cmp_usage =   wd_this->wd_cpuse_method( ).
  IF lo_cmp_usage->has_active_component( ) IS INITIAL.
    lo_cmp_usage->create_component( ).
  ENDIF.
DATA lo_interfacecontroller TYPE REF TO yiwci_sg_method .
lo_interfacecontroller =   wd_this->wd_cpifc_method( ).
  lo_interfacecontroller->execute_method(
       i was able to do the above process successfully but how to bind data to the node of component 2.
In the component 1 : method A i defiend to get records upto 25 rows. now i tried using same method . but how to bind data using this method
Regards
sankar

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