Read all files in one directory

%macro readraw(dir=.);

%local fileref rc did dnum dmem memname;
%let fileref=thisdir;
%let rc=%sysfunc(filename(fileref,&dir));
%let did=%sysfunc(dopen(&fileref));
%let dnum=%sysfunc(dnum(&did));

%do dmem=1 %to &dnum;
%let memname=%sysfunc(dread(&did, &dmem));
%if %upcase(%scan(&memname,-1,.)) = DAT %then %do;
%let dataset=%scan(&memname,1,.);
data &dataset;
infile "&dir\&memname";
input Course_code $4. Location $15. Begin_date date9.;
format Begin_date date9.;
run;

proc print data=&dataset;
title "%trim(&syslast)";
run;
%end;
%end;
%let rc=%sysfunc(dclose(&did));
%let rc=%sysfunc(filename(fileref));

%mend readraw;

options mprint;
%readraw(dir=c:\workshop\winsas\amacr);