Search help as an Drop down

Dear Experts,

Can any one let me know if i can display a Search help as a Drop down.

I know how to get it from a table

The Syntax in GET_P Method.(Unlike the below code i would like to fill lt_keypair from a Search help .

   DATA : lt_keypair   TYPE bsp_wd_dropdown_table,
         ls_keypair   TYPE bsp_wd_dropdown_line,
         lr_dropdown  TYPE REF TO cl_crm_uiu_ddlb.

  ls_keypair-key   = ' '.
  ls_keypair-value = 'All'.
  APPEND ls_keypair TO lt_keypair. ( Or from a database Table).

  CREATE OBJECT lr_dropdown
    EXPORTING
      iv_source_type = 'T'.

  lr_dropdown->set_selection_table( it_selection_table = lt_keypair ).

  rv_valuehelp_descriptor = lr_dropdown.