ynchronous operations that were initiated in
                the current thread.
              </li>
<li class="listitem">
                It can appear to complete without error, but the request to cancel
                the unfinished operations may be silently ignored by the operating
                system. Whether it works or not seems to depend on the drivers that
                are installed.
              </li>
</ul></div>
<p>
            For portable cancellation, consider using one of the followi