title: How to prevent user from deleting sheet, but leave all else open
body: <p>I have developed an Excel Application in which useres can enter custom categories. I let the user call up and hide this data entry worksheet with a button in the custom ribbon. </p>
  
  <p>Now I've realized that the user can accidentally delete these worksheets. How do I disable the delete command for this worksheet while leaving all else open?</p>
  
  <p>I've been searching the web but have come up empty on this.</p>
  
  <p>This is for Excel 2007</p>
  
  <p>Thanks</p>