how to display alert in system tray using c#

Hi
I want to display alert in system tray using c#.
Message is shown in popup window (like form) ,fetched from database
it will be displayed for 10 seconds
If user forget to see ,it will be displayed as icon in the system tray
and clicking can be opened to see the popup window.

Please help me.
It is urgent.
Regards
Rama