ENCODE_KONTL is a standard SAP function module that performs functionality. This is available within standard R/3 SAP systems depending on version and release level.
Below are the pattern details for this FM showing its interface including any import, export and tables parameters. There is also a list of Exceptions and for your convenience any standard documentation available. All this information and more can also be viewed if you enter the function module name ENCODE_KONTL into the relevant SAP transaction such as SE37 or SE80.
CALL FUNCTION 'ENCODE_KONTL' " EXPORTING i_vlxx_mwtot = " vlxx_mwtot IMPORTING e_kontt = " dfkkop-kontt e_kontl = " dfkkop-kontl . " ENCODE_KONTL