title: How can I check free space during a NullSoft silent install?
body: <p>In silent install mode the user is not asked about the installation target with the <a href="http://nsis.sourceforge.net/Docs/Chapter4.html#4.5.6" rel="nofollow noreferrer"><code>PageEx directory</code></a>, and therefore the functions <a href="http://nsis.sourceforge.net/Docs/Chapter4.html#4.8.1.16" rel="nofollow noreferrer"><code>DirVerify</code></a> and <a href="http://nsis.sourceforge.net/Docs/Chapter4.html#4.9.7.2" rel="nofollow noreferrer"><code>GetInstDirError</code></a> are never called.</p>
  
  <p>This is also applicable to installs that hardcode the installation target (a bad idea) for the same reason as above: the <code>PageEx directory</code> is never invoked.</p>