www.pudn.com > QqMsgView.rar > md5.h

typedef struct { 
  unsigned long state[4];                                   /* state (ABCD) */ 
  unsigned long count[2];        /* number of bits, modulo 2^64 (lsb first) */ 
  char buffer[64];                         /* input buffer */ 
} MD5_CTX; 
void MD5Init(MD5_CTX *); 
void MD5Update(MD5_CTX *,int); 
void MD5Final(MD5_CTX *);