title: ANT delete task and Windows 7 UAC permissions
body: <p>When I do a simple delete of the contents of a folder,</p>
  
  <pre><code>&lt;delete includeemptydirs="true"&gt;
    &lt;fileset dir="${developmentenvironment.www.dir}" includes="**/*"/&gt;
  &lt;/delete&gt;
  </code></pre>
  
  <p>I get an error:</p>
  
  <pre><code>C:\Users\...\build.xml:42: Unable to delete file C:\...\www\appserv\AUTHORS.txt  
  </code></pre>
  
  <p>When, I try to delete the file in the OS, it requires elevated permissions.</p>
  
  <p>I also can't get a UAC prompt by doing this:</p>
  
  <pre><code>&lt;exec executable="cmd"&gt;
    &lt;arg value="/c del ./*.*"/&gt;
  &lt;/exec&gt; 
  </code></pre>
  
  <p><strong>Can ANT prompt for elevated UAC permissions when using the delete task?</strong></p>