Hi Oz,
There are many ways of doing this, I would use the &YYMD function to return the current date, a define for what you want would then look like this:
DATE1/YYMD=&YYMD;
DATE2/MDYY='11022002';
DIFF/I4=DATEDIF(DATE2, DATE1, 'M');
where DATE2 is the date returned from your HTML form. This...