ABAP Dropdown in SAP CRM UI

dropdownCRMUI.abap

*-- This code is placed within the GET_V of the attribute within the context node
*-- (please note that the GET_P must also specify that it is type picklist in the appropriate WHEN clause).

 DATA: lo_ddlb TYPE REF TO cl_crm_uiu_ddlb,
  lt_dropdown TYPE bsp_wd_dropdown_table.

*-- Create an instance of the class specifying that the source type is a table.
  CREATE OBJECT lo_ddlb
    EXPORTING
      iv_source_type = gr_owner->gc_source_type_table. "This value is 'T' for Table.

*-- Bind the dropdown table to the dropdown and set that to the returning param.
  lo_ddlb->set_selection_table( it_selection_table = lt_dropdown ).
  rv_valuehelp_descriptor = lo_ddlb.