Getting Standardized Betas in PROC GLM | SAS Code Fragments

data test;
  input y x1 x2 x3 ;
cards;
9 4 5 9
2 8 3 2
3 2 1 8
3 4 5 9
3 9 4 5
8 3 2 9
5 4 9 3
3 4 9 4
;
run;

title ‘reg test standardized estimates’;
proc reg data=test;
  model y = x1 x2 x3  / stb ;
run;
* standardize variables ;
proc standard data=test out=test2 mean=0 std=1;
  var y x1 x2 x3 ;
run;
* glm on standardized variables to get standardized estimates;
proc glm data=test2;
  model y = x1 x2 x3 / solution ;
run;