rd">namespace </span>boost {</div><div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="keyword">namespace </span>nowide {</div><div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="preprocessor">#if !defined(BOOST_WINDOWS) &amp;&amp; !defined(BOOST_NOWIDE_DOXYGEN)</span></div><div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;    <span class="keyword">using</span> std::getenv;</div><div class="line"><a name