title: Xtragrid column checkedit check all header
body: <p>,Hi guys,</p>
  
  <p>I am using Devexpress Xtragrid in winforms.</p>
  
  <p>I have a <strong>checkedit(checkbox) column.</strong> </p>
  
  <p><strong>I want to put a column header and if i click to header i want to set all rows checked.</strong></p>
  
  <p>However ,</p>
  
  <p>In this example,</p>
  
  <p><a href="https://documentation.devexpress.com/#WindowsForms/DevExpressXtraGridViewsGridGridOptionsSelection_ShowCheckBoxSelectorInColumnHeadertopic" rel="nofollow">https://documentation.devexpress.com/#WindowsForms/DevExpressXtraGridViewsGridGridOptionsSelection_ShowCheckBoxSelectorInColumnHeadertopic</a></p>
  
  <p>there is no property as</p>
  
  <pre><code>"ShowCheckBoxSelectorInColumnHeader".
  </code></pre>
  
  <p>What property use in order to achieve checkbox column header to active ?</p>
  
  <p>Any help will be appreciated.</p>
  
  <p>Thanks.</p>