Interact with the user in the admin forms

In the XAML forms, you may interact with the user with these kind of method

Display a popup:

Sitecore.Context.ClientPage.ClientResponse.Alert("My message");

Download a file

Sitecore.Context.ClientPage.ClientResponse.Download(@"c:\MyPath\Myfile.xxx");

Display an input

Input(string text, string defaultValue, string validation, string validationText, int maxLength)

Change the HTML in ajax:

SheerResponse.SetInnerHtml("MyBorderName", "My String");

Launch a timer (to refresh the page every XX seconds for example)

SheerResponse.Timer("CheckStatus", 100);

If you inherit from WizardFrom these methods work perfectly, but if you inherit from Sitecore.Web.UI.Sheer.BaseForm it seem that it doesn't work.
Here is a simple workaround to bypass this limitation:

• Add this in you xaml:
  
  

  <script type='text/javascript'>window.setTimeout('scForm.invoke("local:show")', 0)</script>
  

• And now you can invoke these methods without problems
  
  

  [HandleMessage("local:show")]
  protected void Show(Message message)
  {
      //This method work to launch a timer
      SheerResponse.Timer("CheckStatus", 100);            
  }