Drag & Relate scenario

Hello,

I have setup R/3 in the portal for drag & relate, and i have a custom iView which I want to use with the R/3 for drag and relate. the iView is the drag & relate target, it needs to be able to (when we drop "something" on it) get the parameters from the the object using the drag & relate context (?) and use them for further processing - i.e use the params in a query , etc. I would like to know, how exactly do i do that? Is that done programatically, or rather from the portal? Do I need to change my iView in order to enable it for drag & relate, and to act as a target? If yes, should i also do that programatically, or by setting up the iView properties? Thank you very much in advance.

Regards,

Angel