title: Make all controls inside a GroupBox read-only?
body: <p>I know that many individual controls have a <code>ReadOnly</code> property. But suppose I have a <code>GroupBox</code> in which there are many different controls (text boxes, combo boxes, radio buttons, etc ..), is it possible to set the <code>ReadOnly</code> property for all these controls together?   </p>
  
  <p>Not that I only want to set this property for the controls within a specific <code>GroupBox</code> (because I have multiple GroupBoxes too, so I don't want the setting to be done for controls in other GroupBoxes) ..</p>
  
  <p>Manually setting the <code>ReadOnly</code> property seems very lethargic, as I have as many as 20 controls in each <code>Groupbox</code> (don't ask why :p).</p>