Inno Setup custom page with multiple destination folders that behave like the normal folder select page

Question

I\'ve the following code (taken from Use two/multiple selected directories from custom page in Files section):

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Answer 1

For future reference, here is the full working code based on Martin's answer. Make sure to add "DisableDirPage=yes" to the [Setup] section.

Note: Due to a bug, the code below works only in the unicode version of InnoSetup.

[Code]
var
  DirPage: TInputDirWizardPage;
  HiddenPage: TInputDirWizardPage;
  HiddenPage2: TInputDirWizardPage;
  HiddenPage3: TInputDirWizardPage;

procedure AppendDirBrowseClick(Sender: TObject);
begin
  HiddenPage.Values[0] := DirPage.Values[0];
  HiddenPage.Buttons[0].OnClick(HiddenPage.Buttons[0]);
  DirPage.Values[0] := HiddenPage.Values[0];
end;

procedure AppendDirBrowseClick2(Sender: TObject);
begin
  HiddenPage2.Values[0] := DirPage.Values[1];
  HiddenPage2.Buttons[0].OnClick(HiddenPage2.Buttons[0]);
  DirPage.Values[1] := HiddenPage2.Values[0];
end;

procedure AppendDirBrowseClick3(Sender: TObject);
begin
  HiddenPage3.Values[0] := DirPage.Values[2];
  HiddenPage3.Buttons[0].OnClick(HiddenPage3.Buttons[0]);
  DirPage.Values[2] := HiddenPage3.Values[0];
end;

function SkipPage(Sender: TWizardPage): Boolean;
begin
  Result := True;
end;

procedure InitializeWizard();
begin
  DirPage := CreateInputDirPage(
    wpSelectDir, SetupMessage(msgWizardSelectDir), '', '', False, '');

  DirPage.Add('Path to Apache:');
  DirPage.Add('Path to PHP:');
  DirPage.Add('Path to Server Files:');

  { assign default directories for the items from the previously stored data; if }
  { there are no data stored from the previous installation, use default folders }
  { of your choice }
  DirPage.Values[0] := GetPreviousData('Directory1', 'C:\Apache');
  DirPage.Values[1] := GetPreviousData('Directory2', 'C:\PHP');
  DirPage.Values[2] := GetPreviousData('Directory3', 'C:\Apache\htdocs\Server Files');

  DirPage.Buttons[0].OnClick := @AppendDirBrowseClick;
  DirPage.Buttons[1].OnClick := @AppendDirBrowseClick2;
  DirPage.Buttons[2].OnClick := @AppendDirBrowseClick3;

  HiddenPage := CreateInputDirPage(
    wpSelectDir, SetupMessage(msgWizardSelectDir), '', '', True, 'Apache');
  HiddenPage.Add('');
  HiddenPage.OnShouldSkipPage := @SkipPage;

  HiddenPage2 := CreateInputDirPage(
    wpSelectDir, SetupMessage(msgWizardSelectDir), '', '', True, 'PHP');
  HiddenPage2.Add('');
  HiddenPage2.OnShouldSkipPage := @SkipPage;

  HiddenPage3 := CreateInputDirPage(
    wpSelectDir, SetupMessage(msgWizardSelectDir), '', '', True, 'Server Files');
  HiddenPage3.Add('');
  HiddenPage3.OnShouldSkipPage := @SkipPage;
end;