Invoking classification in WFP API

*Hello forum, a wonderful to you*

*Thank you so much for your correspondence, do have the following
questions:*

*From :
https://msdn.microsoft.com/en-us/library/windows/desktop/aa363977(v=vs.85).aspx
https:
"During classification, the
properties (for example, source address) of the packet, stream, or event
are compared with filter conditions set on

filters at the layer where the classification is invoked. When matches
are found, the Filter *
Arbitration algorithm is used to determines the result of the
classification process."


My question are :

How do i set classification at the layer where the classification is
invoked


How is classification invoked

My Classification actions are for DNS redirection and interception</https:>