Listening for FD_QOS Events

QOS status is provided through FD_QOS events. Applications that either send or receive QOS-enabled data can listen for FD_QOS events by either of the following mechanisms:

• Register for FD_QOS events using the WSAAsyncSelect or WSAEventSelect function.
• Perform an overlapped WSAIoctl(SIO_GET_QOS) function call.

Each of these approaches is explained in the following sections.