From: fizzbintuesday@that-google-mail-domain.com   
      
   The objective is to remove everything except digits 0-9 from a string.   
      
   %alpha_substrings% does contain all possible non-numeric substrings   
   (space separated), so this should remove them and leave only the digits.   
      
   set "only_numbers=string"   
   for %%t in (%alpha_substrings%) do (   
           call set "only_numbers=%%only_numbers:%%t= %%"   
   )   
      
   But some characters in the non-numeric substrings, like =, don't get   
   removed because they are never included in %%t.   
      
   If FOR/F is used then it includes those characters because they are not   
   seen as delimiters, but it doesn't spit them out one at a time in   
   multiple loops.   
      
   I'm tempted to use GWBASIC (MS just made it open-source!).   
      
      
   --   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)