Here is SAS code that demonstrates how to use a DATA step to generate a CSV file with two lines for heading
data _NULL_;
set sashelp.class; /* replace with your data set name */
file 'c:\temp\test.csv' dlm=',';
if _N_ = 1 then do;
put 'first line heading'; /* replace with your heading */
put 'name,age,sex,height,weight'; /* replace with your variables */
end;
put name age sex height weight; /* replace with your variables */
run;
If you have more then 256 characters per output line, you need an LRECL parameter on the FILE statement.
I invite you to send email to support.sas.com if you have further questions.
Jan