Drag-Drop Listener

Hello,

I'm want to do a drag-drop to the "CKEditor", in the old version "FCKEditor" i
could attach events in the editor using the event "OnDrop" to the drag-drop.

Code using the FCKEditor and I can do:

oFCK FCKeditorAPI.GetInstance = ( 'FCKeditor1');
oFCK.Events.AttachEvent ( 'OnDrop' DoDrop);

Code using the CKEditor and not working:

CKEDITOR.instances [ "editor1"]. On ( 'OnDrop', function () (alert ( "Event drop");));

How to do the CKEditor faithless OnDrop the event ?