Short notation for a Time Zone

[Hari Somaskanthan]

Hi,

I have used the Windows API function (i.e. GetTimeZoneInformation()) to retrieve
the Time Zone for the current machine. I would like to get the 3 chars short
notation for the Time Zone description such as GMT, EST, MST, PST, etc. How
do I get this 3 chars notation ? Is there any standard way of getting this
information ?

Thanks for your help
Hari