title: CheckComboBoxColumn in DevExpress GridView
body: <p>I want to get CheckedList DropDown control, which is a basic DropDown with checkbox in front of each list item.</p>
  
  <p>I found <a href="http://demos.devexpress.com/aspxeditorsdemos/ASPxDropDownEdit/CheckComboBox.aspx" rel="nofollow">this demo</a> from their official site but I want the same effect in a ASPxGridView column.</p>