title: DevExpress dateedit customization to allow only specific dates
body: <p>I have used the example here <a href="http://www.devexpress.com/Support/Center/Example/Details/E2007?currentProgrammingLanguage=VB.NET&amp;version=v2009%20vol%202.9%20-%20v2012%20vol%201.9" rel="nofollow">How to create a DateEdit descendant that will allow date unit selection, and multiple dates and periods selection</a>. I wanted to add one more functionality where I would provide an array of dates only those will be visible. I have modified the code and included a property to accept the date ranges, which if provided would only allow seeing and selecting those dates, but I'm unable to understand which function I should override to accomplish the task. The behavior should be like when the editor is supplied <code>MaxValue</code> and <code>MinValue</code></p>
  
  <p><a href="http://pastebin.com/jcbyYeXS" rel="nofollow">Here is my code</a></p>