On postback you can inspect the _COMMANDTARGET and compare that to the control.UniqueID string to see which control caused the postback. does that spark a lightbulb maybe? ----- Original Message ---- From: Casey Crookston <caseyc at IntelliSoftmn.com> To: thelist at lists.evolt.org Sent: Wednesday, April 18, 2007 11:23:38 AM Subject: Re: [thelist] .NET: Generally speeding things up (Ajax?) It looks like I have identified the souce of the slowness. So I am back to my original problem: How do I EFFECTIVLY add multiple instances of this user control, maintain them each, and not bloat the viewstate?