My netbook, which is running Windows XP, has the Fn + F12 function to send the netbook into sleep mode. Remember that you need to combine the Fn key with a function key (F1 - F12) to access the extra functions.
Another way is to put a shortcut on the desktop. I've got two, one for Windows Shutdown and one for Windows Restart. If this idea is of interest to you reply to this thread and I will provide instructions. I'll have to check how it's done on my wife's Vista laptop.
Many thanks, all. Sorry for late response - I didn't get a reminder/notification by email. I have found that pressing the FN key brings up a reminder of what all the F keys do. It is Fn + F3 for sleep and F4 for hibernate.
Yes please, Peter, if you could let me know how to make a shortcut on the desktop, I would be grateful.
I have configured the Power Plan, but it doesn't seem to work as far as the button is concerned - will try again.