title: How to check and uncheck and enable and disable a check Box control in MFC
body: <p>What is the source code to do the standard checkbox actions with a Visual C++ MFC checkbox control?</p>
  
  <ul>
  <li>set a check in the displayed checkbox control</li>
  <li>clear a check in the displayed checkbox control</li>
  <li>enable the displayed checkbox control for user input</li>
  <li>disable the displayed checkbox control for user input</li>
  </ul>