How to set and get value on table TVARVC

Set 

SM30 > Table/View = TVARV

GET

Function : Z_INITIAL_VALUE_GET

CLEAR gr_hkont.
  CALL FUNCTION 'Z_INITIAL_VALUE_GET'
    EXPORTING
*     IM_REPID = SY-CPROG
      im_filed = 'HKONT'
    TABLES
      tr_data  = gr_hkont.