From: nowhere@never.at   
      
   correction:   
   ..   
   >> Why not?  If guarenteed to only have alpha and numeric chars, an   
   >> AND will work also.  Numeric chars have bit 6 cleared, while alpha   
   >> chars have bit 6 set.   
      
   > ??? don't we talk about bit 5 here (Ucase vs. Lcase) ?   
      
   If you clear bit 5 on a number ie: 0x30 it becomes a 0x10.   
      
   __   
   wolfgang   
      
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