Telerik drag and drop example (nice) doesn't include scenario for separate pages or 'Handles' clause

[John]

Greetings,

Please see the following article which illustrates drag and drop scenarios for a tree and grid:

http://demos.telerik.com/aspnet-ajax/treeview/examples/functionality/draganddropnodes/defaultcs.aspx

You will notice the code behind does not include scenarios where there is a master page, which redirects to a child page which may inturn call upon a separate control (ascx file).  This is the kind of setup which I have:

1)  MasterPage  Contains the RadTree
2)  ASPX page
3)  ASCX page which holds the RadGrid control displayed on the ASPX page

Given this kind of setup, I need to use a Handler but I'm not sure how it all should be referenced

Any ideas?
Thanks!