give me some advice about CFB

/* The data is encrypted in CFB mode, with a CFB shift size equal to the cipher's block size. The Initial Vector (IV) is specified as all zeros. Instead of using an IV, OpenPGP prefixes a 10-octet string to the data before it is encrypted. The first eight octets are random, and the 9

I can't the run the example program, why?

http://www.openssl.org/docs/crypto/EVP_DigestInit.html# I can't run the example program win2000, VC6.0 any help thanks USTC Alumni Email System, http://mail.ustc.edu, FREE Signup. __ OpenSSL Project