[in] Pointer to the IFWXIOCompletion interface that
is notified when the send operation is completed. Set this
parameter to NULL if notification is not required.
[in] An opaque value to pass to the IFWXIOCompletion::CompleteAsyncIO
notification method. This parameter provides a context to the
notification, thereby allowing identification of each send
To receive a notification when the send operation is completed,
specify an IFWXIOCompletion interface pointer in the