Changing windows proxy to be either system or user based

Today I was trying to figure out how to change windows to use the proxy setting on a machine basis rather then by user. This registry key setting is supposed to be the 'key'.

System Key: [HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\

Internet Settings]

Value Name: ProxySettingsPerUser

Data Type: REG_DWORD (DWORD Value)

Value Data: (0 = whole machine, 1 = per user)