在Inno Setup Pascal脚本中销毁对象

如何销毁如下创建的对象。我可能需要根据先前页面的答案来更改页面：

[Code]

var
  UninstallFirstPage: TNewNotebookPage;

procedure Whatever();
begin
  UninstallFirstPage := TNewNotebookPage.Create(UninstallProgressForm);
  UninstallFirstPage.Notebook := UninstallProgressForm.InnerNotebook;
  UninstallFirstPage.Parent := UninstallProgressForm.InnerNotebook;
  UninstallFirstPage.Align := alClient;
   ...

  { How do you destruct UninstallFirstPage - may want to change it after created }

end;