CRC32 Static Library for Microsoft VC++ was produced
to make your CRC checking operations quick & easy to
implement seamlessly without the need for an external
DLL

The CRC is a "digital fingerprint" of a file, With
CRC32 you can "melt down" a huge 20 MB (or even much
bigger) file to have a small, handy reference to it, a
single 32-bit number like 7d9c42fb (hexadecimal
notation) which would unambiguously reflect the entire
contents of this huge file. Now if some changes to
this file happened, no matter how small, maybe only a
single wrong bit somewhere in the middle, a new CRC-32
calculation would yield a completely different
reference number (say 3faa83bd). So there’d be no
doubt about it - this is not the same file anymore. On
the other hand if the reference number was still the
same (7d9c42fb) you might be sure that the file hasn’t
changed.

The algorithm of CRC32 is exactly the same as that

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