windows notify icon c# change message without refresh

How do I change the message displayed within the notify icon baloon tip without the baloon refreshing.

I want to show a countdown timer before the application carries out an event and I want to use the oncli开发者_运维问答ck to cancel the event when the user clicks it.

Thanks Sp

You can't. The only way it to show a new balloon.

An alternative is to use a custom component like http://www.codeproject.com/KB/miscctrl/taskbarnotifier.aspx. I'm not sure whether this one supports what you require, but I'm sure there are out there that do.