This event is generated for sockets that are listening for
connections from a remote host. A connection with the remote system
is not actually established until it has been accepted by the
listening server. This event is only generated for asynchronous
sockets when the Blocking property is set to False.
The Handle argument specifies the socket descriptor of the
listening socket. To accept the connection, a socket calls its
Accept method with argument Handle.
The PeerAddress or PeerName properties may be used
to determine the name of the remote host that is establishing the
connection. Note that this information may not be available until
after the Accept method is called to accept the
connection.