title: How to make a Gridview Header Check Box
body: <p>Using VB.Net (Windows Application)</p>
  
  <p>I am using checkbox in the girdview column, now i want to add a checkbox in the header.</p>
  
  <p>If i select the checkbox in the header, all the checkbox in the column should select automatically.</p>
  
  <p>How to do this.</p>
  
  <p>Need VB.Net Code Help</p>