Hi, Enmanuel!

Every container object (form, page, grid etc) has a collection, which you can iterate using

FOR EACH loObject IN This.Controls
   ...do something wiht loObject
ENDFOR

Now you need a mechanism which can find out that loObject is a container object too and call the iterator function recursivly!

BTW: Be aware of different names of these collections in different containers ("Controls" in a form, "Pages" in pageframe, "Buttons" in a option group)!
May be you can also use the "Objects" collection, but I'm not familiar with this!