title: Control a single Form from 2 different forms on c#
body: <p>So I have the following:
  <strong>FormA</strong>, <strong>FormB</strong>, <strong>FormCtrl</strong></p>
  
  <p>When <strong>FormA</strong> loads, <strong>FormCtrl</strong> is shown:</p>
  
  <pre><code>FormCtrl fc = new FormCtrl();
  fc.Show();
  </code></pre>
  
  <p>From <strong>FormA</strong>, I can control <strong>Panel1</strong> on <strong>FormCtrl</strong> and I can also load <strong>FormB</strong>:</p>
  
  <pre><code>FormB fb = new FormB();
  fb.Show();
  
  fc.Panel1.Visible = true;
  </code></pre>
  
  <p>From <strong>FormB</strong>, I need to control <strong>Panel2</strong> on <strong>FormCtrl</strong>:</p>
  
  <pre><code>fc.Panel2.Visible = true; // I don't know how to do this :)
  </code></pre>