I currently use sas in batch on mvs in a tso environment. Often i read in the data needed in JCL. The file lengths are the same and fields are the same. What i would like to do is set up in The SAS part of my program to use a Macro variable instead of having to either copy and paste from different programs or retype all my input variables. I have no experience with macros, but believe this to be not too difficult. How would i read in the DSN containing the variables in the below code?

Thank you

DATA TEST; INFILE FILEONE; /* ACTUAL DATA FILE READ IN FROM JCL*/ INPUT @1 V1 $2. @5 V2 5. @10 V3 10.; /* ACTUALLY QUITE A MORE VARIABLES THEN THESE */ RUN;