How to display systemtray Icon in windows 7

Hi,

While launching the application in windows services mode the systemTrayIcon should appear with some popup message.
I did swing coding for this it is working fine in windows XP, But it is not working as expected in windows 7.

Is any code change is required for windows7..?? or any special registry keys i need to add..??
I came to know by searching some forums, in windows XP default session is 0, but for windows 7 it will maintain different sessions.
This might be the reason for not enabling systemTrayIcon in windows 7.

please help me out in this.

Thanks,
Ram