WMI Permanent Event Consumer in C#

[Adam]

Hi,

I want to create a custom permanent event consumer in C#. Since
System.Management does not support this yet, I have to use Com interop
to reference IWBemUnboundObjectSink for my .net event consumer, and
IWbemProviderInit + IWbemEventConsumerProvider for my event consumer
provider. (I have read this doc on msdn:
http://msdn.microsoft.com/en-us/library/aa393014%28VS.85%29.aspx) How
can I reference these com interfaces? Is there a type library for WMI
which includes these?
Did somebody do something like this before? or can point me to the
right direction?
Thanks