Change a Filename before Unzipping

How to open a zip and modify the filename of one or more files within the zip before unzipping.

Download Chilkat 32-bit Zip ActiveX (.msi) (includes objects for .zip, .gz, .bz2, and .Z)

Download All 32-bit Chilkat ActiveX Components (.zip)

Download All 64-bit Chilkat ActiveX Components (.zip)

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
zip: TChilkatZip2;
success: Integer;
entry: IChilkatZipEntry2;
numFilesUnzipped: Integer;

begin
zip := TChilkatZip2.Create(Self);

//  Any string unlocks the component for the 1st 30-days.
success := zip.UnlockComponent('Anything for 30-day trial');
if (success <> 1) then
  begin
    ShowMessage(zip.LastErrorText);

  end;

success := zip.OpenZip('test.zip');
if (success <> 1) then
  begin
    ShowMessage(zip.LastErrorText);

  end;

entry := zip.GetEntryByName('hamlet.xml');
//  Assume entry is non-null.  If GetEntryByName failed
//  to find the entry, it returns a null reference.
entry.FileName := 'hamlet2.xml';

entry := zip.GetEntryByName('helloWorld.pl');
entry.FileName := 'hw.pl';

//  Now unzip to the "test" subdirectory, under our current
//  working directory:
numFilesUnzipped := zip.Unzip('test');
if (numFilesUnzipped < 0) then
  begin
    ShowMessage(zip.LastErrorText);

  end;

//  The filenames within the .zip are unchanged, but it unzipped
//  test/hw.pl and test/hamlet2.xml

end;