title: How to prevent showing form second time?
body: <p>I calling my form by buttonclick:</p>
  
  <pre><code>var form = new GPZUWizardForm(
      Модуль.ИнформацияОСессии,
      Модуль.IngeoApplication,
      кодВИнгео,
      pzzMapObjectId,
      кодЗУ,
      номерСтраницы,
  гпзу);
  if (!form.Visible)
     Application.Run(form); 
  </code></pre>
  
  <p>When i click button second time form showing again.<br>
  How to show only one form in once?</p>