My problem

hello guys,

I followed the steps on the documentation and now my drupal site is showing in my canvas as an iframe. How do I show only a particular content, lets say an output from a menu callback?

I don't seem to understand yet how to serve my own content. should I pass it on $result variable of hook_fb? lilke:

$result = "This should only be the string to appear on my canvas"

Please help!