28   %
if &inref = ____in %then %
do;
    29     filename &inref &inloc lrecl=1048576 ;
    31   %
if &outref=____out %then %
do;
    32     filename &outref &outloc lrecl=1048576 ;
    37      length filein 8 fileid 8;
    38      filein = fopen(
"&inref",
'I',1,
'B');
    39      fileid = fopen(
"&outref",
'O',1,
'B');
    41      do while(fread(filein)=0);
    42         rc = fget(filein,rec,1);
    43         rc = fput(fileid, rec);
    49   %
if &inref = ____in %then %
do;
    50     filename &inref clear;
    52   %
if &outref=____out %then %
do;
    53     filename &outref clear;