GET and CHECK select-options.

hi,

i have a report where it has lines like

GET ekko FIELDS bstyp ebeln ekorg ekgrp bedat ernam lifnr.

CHECK select-options.

i tried to check for SAP help, but it said, its become obsolete.

can you please tell me how does this syntax work and if i want to change it what is the alternative to it?

thanks in advance.