title: How to change controls simultaneously without repainting each one?
body: <p>For example I need to disable two buttons in runtime. After I disabled first button it bacame gray, the second - it also became gray. But I do not know how to make the repainting simultaneous! </p>
  
  <p>I need something like that:</p>
  
  <ol>
  <li>freeze the Form (disable repainting)</li>
  <li>disable first button</li>
  <li>disable second button</li>
  <li>Enable Form repainting</li>
  </ol>
  
  <p>How to implement that?</p>