C++ SDK WFP callout functions

Nowadays I am doing some research on WFP (Windows Filtering Platform) functions. But after googling for last 5days I did not find a single example of WFP callout functions. Would anyone please share some codes on 开发者_如何转开发it ?

Thanks.

A sample is available here. The download link is dead, it got moved here.

That link seems broken. I would suggest to check always the samples included in the DDK, they are great:

http://msdn.microsoft.com/en-us/library/windows/hardware/ff568374(v=vs.85).aspx