Get WBS details

*Get the WBS Details from project Def
  CALL FUNCTION 'BAPI_PROJECT_GETINFO'
    EXPORTING
      PROJECT_DEFINITION     = ‘Project ID’ 
    TABLES
      E_WBS_ELEMENT_TABLE    = P_G_T_WBS_ELE
      E_WBS_HIERARCHIE_TABLE = P_G_T_WBS_HIE.