How can I positioning a dynamic Form under a edited cell of ListGrid?

* Isomorphic SmartClient
* Version v9.0p_2013-07-14 (2013-07-14)

browser(s) used = chrome and IE 10

Hi to all,
my question is how can I positioning a dynamic Form below a edited cell of ListGrid? In a particular cell of ListGrid, I have an editorType: 'spinner' and in the event editorEnter, I would find a position of edited cell, so I can assign setTop and setLeft to Dynamic Form but I was not enabled to find the cell position.
I can do it?

thanks in advance