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NAME

       memcmp - compare memory areas

SYNOPSIS

       #include <string.h>

       int memcmp(const void *s1, const void *s2, size_t n);

DESCRIPTION

       The memcmp() function compares the first n bytes of the memory

       areas s1 and s2.  It returns an integer less than, equal  to,

       or  greater  than zero  if  s1  is  found, respectively, to be

       less than, to match, or be greater than s2.

RETURN VALUE

       The memcmp() function returns  an  integer  less  than,  equal 

       to,  or greater than zero if the first n bytes of s1 is found,

       respectively, to be less than, to match, or be greater than the

       first n bytes of s2.

unsigned char array2[20];

PT_CHANNEL  ptCHANNEL;

if(memcmp(&ptCHANNEL->data,array2,20))