title: Check if file exists in C++
body: <p>I'm very very new to C++.
  In my current project I already included</p>
  
  <pre><code>#include &lt;iostream&gt;
  #include &lt;Windows.h&gt;
  #include &lt;TlHelp32.h&gt;
  </code></pre>
  
  <p>and I just need to do a quick check in the very beginning of my main() to see if a required dll exists in the directory of my program.
  So what would be the best way for me to do that?</p>