Why GetStringValue return NULL?

Dear All:

Here is code snippet digest from "The Portable Script Center",
which is a help document published on microsoft's websiet.

Const HKEY_CURRENT_USER = &H80000001
Const HKEY_LOCAL_MACHINE = &H80000002

strComputer = "."

Set oReg=GetObject("winmgmts:{impersonationLevel=impersonate}!\\" & _
strComputer & "\root\default:StdRegProv")

strKeyPath = "Console"
strValueName = "HistoryBufferSize"
oReg.GetDWORDValue HKEY_CURRENT_USER,strKeyPath,strValueName,dwValue
Wscript.Echo "Current History Buffer Size: " & dwValue


strKeyPath = "SOFTWARE\Microsoft\Windows Script Host\Settings"
strValueName = "TrustPolicy"
oReg.GetStringValue
HKEY_LOCAL_MACHINE,strKeyPath,strValueName,strValue
Wscript.Echo "Current WSH Trust Policy Value: " & strValue

I don't know how it works on your machins, but on both my two windows
2000 machines, it can't output string value ("TrustPolicy").

I tried other keys, but failed too. When I tried a key(still a string
value) under HKEY_CURRENT_USER, it works.

Why? Is it a previlidge issue?

Thanks in advance.
.

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