>Could someone point me in the direction I need to look for code samples to sync the computer clock with the atomic clock?
>Any comments or concerns from people who use this would be great.

I generally let the Windows Time Service take care of this: http://www.microsoft.com/windowsxp/home/using/productdoc/en/default.asp?url=/windowsxp/home/using/productdoc/en/net_time.asp

I use the NET TIME command with the /setsntp option. If you want to sync with the US Naval Observatory you can do something like

NET TIME /setsntp:tick.usno.navy.mil tock.usno.navy.mil
or
NET TIME /setsntp:ntp1.usno.navy.mil ntp2.usno.navy.mil