How do you tell Visual Studio what type the passed variable is when you do an include on a template?

Question

C++ / C#

aspx templates. For example, in the main template on the catalog page goes
In the Actions.aspx file itself, you need to refer to this.actions.
The code works but VS doesn't highlight.
In PHP it would be something like:

<?
/**
 * var this CatalogController
*/
?>