INNO TROUBLESHOOT - Questions Here

[Masquerade]

Hello everyone, I am trying to add a progress bar to a script.

  Progress:= TNewProgressBar.Create(WizardForm);
  with Progress do 
  begin
  Parent := WizardForm;
  SetBounds(10, 150, 200, 0);
  Max:=1000;
  end;

function ProgressCallback(OveralPct,CurrentPct: integer;CurrentFile,TimeStr1,TimeStr2,TimeStr3:PAnsiChar): longword;
begin
  if OveralPct <=1000 then Progress.Position := OveralPct;
  Result := ISDoneCancel;
end;

if CurPageID = wpInstalling then
  begin
  ExtractTemporaryFile('unarc.dll')
  Progress.Show;
  DesktopIconCheckBox.Enabled := false;
  WizardForm.DirEdit.Hide;
  WizardForm.DirBrowseButton.Hide;
  ISDoneCancel:= 0
  ISDoneError := true;
  if ISDoneInit(ExpandConstant('{src}\records.inf'), $F777, 0, 0, 0, MainForm.Handle, 512, @ProgressCallback) then begin
    ChangeLanguage('English')
    begin
      repeat
        if not ISArcExtract ( 0, 0, ExpandConstant('{src}\*.arc'), ExpandConstant('{app}'), '', false, '', '', ExpandConstant('{app}'), false) then break;
        ISDoneError := false;
      until true;
        ISDoneStop;
      end; 
    end;
  end;

These above code snippets all are the code for the progress bar

I'm not entirely sure why the progress bar isn't showing up during installation.

I click "Install" to trigger wpInstalling.
THe directory box and the browse button disappear and the desktop icon checkbox is frozen. However, the progress bar does not appear.

Why could this be? Thanks!