TreeGrid onFolderDrop event ?

I'm running SmartClient Version: v9.0p_2013-07-15/PowerEdition Deployment (built 2013-07-15)

I need access to the dsResponse object in the onFolderDrop event of the TreeGrid, or any other methodology to detect a setProperty value coming from the server in the dsResponse when a drag/drop operation happens.

Can someone point me in the right direction?!

Thanks,
Jerry