Compute File CRC

Calculate the CRC for a file in the filesystem.

Download Chilkat Zip ActiveX (includes objects for .zip, .gz, .bz2, and .Z)

uses
    Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
    Dialogs, StdCtrls,
    ChilkatZip2Lib_TLB,
    OleCtrls;

...

procedure TForm1.Button1Click(Sender: TObject);
var
zipCrc: TChilkatZipCrc
crc: Integer;
hexStr: String;

begin
zipCrc := TChilkatZipCrc.Create(Self)

crc := zipCrc.FileCrc('someFile.dat');

hexStr := zipCrc.ToHex(crc);
Memo1.Lines.Add(hexStr);
end;