Where is NPI_WSK_INTERFACE_ID? Unresolved external symbol

I am trying to enable event callback for listening socket. However I am
getting the link error:

error LNK2001: unresolved external symbol NPI_WSK_INTERFACE_ID

All other wsk functions and symbols are fine except for
NPI_WSK_INTERFACE_ID. Where can I find it?

Here is the code:

callbackControl.NpiId = (PNPIID)&NPI_WSK_INTERFACE_ID;
callbackControl.EventMask = WSK_EVENT_ACCEPT;
status = WskProviderNpi->Dispatch->WskControlClient(
WskProviderNpi->Client,
WSK_SET_STATIC_EVENT_CALLBACKS,
sizeof(callbackControl),
&callbackControl,
0,
NULL,
NULL,
NULL);

Many thanks.