title: Check if the form is loaded
body: <p>I have two forms. </p>
  
  <ul>
  <li>One of them is the main form (let's call it MainForm)</li>
  <li>the other one is for showing some warning (let's call it dialogForm)</li>
  </ul>
  
  <p>. dialogForm has a label in it. When i click a button in MainForm, dialogForm opens.
   But label in dialogForm is blank. It doesn't have time to load actually. I want to check if the dialogForm fully loaded then proccess can continue in MainForm.
   For example:</p>
  
  <pre><code>dialogForm tempFrm = new dialogForm();
  tempFrm.Show(); // I want to wait till the dialogForm is fully loaded. Then continue to "while" loop.
  while(..)
  {
  ...
  }
  </code></pre>