Inno Setup customize FinishedLabel with Pascal Script

My goal with Inno Setup 6.x is to customize the FinishedLabel text in code, i.e., Pascal Script. The reason why I'm using Pascal Script is that I want to only customize/change the label if IsAdminMode() is true. How can I do that?

The following two approaches do not work:

Use a scripted constant:

[Messages]
FinishedLabel={code:GetFinishedLabel}

[Code]
function GetFinishedLabel(Param: String): String;
begin
  Result := 'BLA';
end;

This shows "{code:GetFinishedLabel}" rather than "BLA".

Customize the wizard in InitializeWizard.

Complete (failing) example:
```
[Code]
procedure InitializeWizard();
begin
  WizardForm.FinishedLabel.Caption := 'BLA';
end;
```
The FinishLabel still shows the original text from Default.isl

Any ideas?

Solution

The FinishedLabel is updated at the end of the installation according to various factors. So your value set in InitializeWizard is overridden. You have to set your custom message later, such as in CurPageChanged(wpFinished):

procedure CurPageChanged(CurPageID: Integer);
begin
  if CurPageID = wpFinished then
  begin
    WizardForm.FinishedLabel.Caption := 'BLA';
  end;
end;

You might consider to improve the code to do what Inno Setup would do, like:

Taking into account, if restart is needed (FinishedRestartLabel);
Taking into account, if icons were created (FinishedLabel vs. FinishedLabelNoIcons);
Adjusting the label height to fit the message;
Shifting RunList position according to the message height.