title: Adding Checkbox to comboBox not visible in dropdown
body: <p>I am adding a checkbox to a comboBox in a windowsform. The checkbox add and I can select them as Items but I can see the text of the box to tick. In the combobox drop down the items are list empty and clicking on them specific the correct details when incepting the selected item.</p>
  
  <p>How do I make them visable to see the box and name?</p>