title: Select entire columns
body: <p>I have a range activated <code>Range(strPlageSélectionnée).Activate</code>, and i'm looking for selecting their entire columns in order to delete them. 
  I know that to select a column there is a specific formula <code>ActiveCell.EntireColumn.Select</code>
  and to delete one column it's <code>ActiveCell.EntireColumn.Delete</code></p>
  
  <p>But how can i select and delete many columns at once. Is there any specific formula ?</p>
  
  <p>Thanks for your help</p>