a><span class="special">&gt;</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">system</span><span class="special">::</span><span class="identifier">error_code</span> <span class="identifier">io_control</span><span class="special">(</span>
    <span class="identifier">IoControlCommand</span> <span class="special">&amp;</span> <span class="identifier">command</span><span class="special">,</span>
    <span class="identifier">boost</span><span class="special">::