Sorry to resurrect this old post, but could you possibly elaborate on why "OnEnter" can't be implemented on the grid? I've recently implemented "OnEnter" by piggybacking off of the ExtJS "focusenter" event, which sends an event to the (server-side) grid that is processed in the "JSEventHandler" method (not sure if this was the approach used by A. Soltani) and it seems to work okay. Is there some hidden "gotcha" to this implementation that I'm not aware of?