dear Imar:
   thanks for your advice.
   i did according to what you told me to, read the info,visit the site Apress and Wiley,but the code cannot be found either,some page, on Wiley, cannot be opened at all.
   how about you spend a "n time" looking on the webpage.
   i'll be very pleased if you have more info about it.
   if not , do you think i should ask for the code from god?

   IMP, work should be done better,dont you think something should be changed, how about a direct link to the code?
   TIME is expansive, ok?
   the more efficient,the better!

nameoflynn