ISBN2.ACC, ISBN2.PRG


Update 31/05/94
ISBN.ACC  has been modified to use the same window  interface  as 
ISBN.PRG.  As  a result,  there is no longer a separate  resource 
file. Ignore any references to the Resource File in the following 
text. ISBN.ACC and ISBN.PRG are not interchangeable.

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ISBN2.ACC  and ISBN2.PRG are programs that can verify whether  or 
not an International Standard Book Number (ISBN) is valid or not. 
ISBN2.ACC  is  a desk accessory that loads in  a  resource  file, 
ISBN2.RSC.  ISBN2.PRG  is  a standalone program that  utilises  a 
window  for  its  interface with the  user.  ISBN2.PRG  does  not 
require  a  resource  file,  and  it cannot  be  run  as  a  desk 
accessory.  (When I get my Lattice C Compiler then I'll get  into 
all those snappy tricks!)

Enter  a ISBN at the prompt,  and ISBN2 will tell you whether  or 
not  the number is valid or not.  Note that ISBN2 will only  work 
with  numeric ISBN codes and will not work with the numbers  that 
have letters such as 'Y' in the middle. (I don't know what you're 
supposed to do with those letters as my reference material  never 
even  suggested  the existence of such  numbers).  The  letter  X 
appearing at the end of an ISBN is correctly translated, however.

When  typing  in  an  ISBN,  it is permissable  to  type  in  all 
punctuation that may be in the number such as hyphens and spaces. 
ISBN2 will strip these characters out.

ISBN2  (PRG,ACC,TXT and RSC) are freely  distributable  programs, 
and there is no charge for these programs.  Postcards are  always 
welcome, however.


Mark Brinkworth
PO Box 424
Bassendean 6054
Western Australia

GEnie : M.BRINKWORTH