title: How to get Excel to require user to allow macro else cannot open workbook?
body: <p>I have a macro in my Excel file that is meant to determine whether a user can open it or not. However, it seems like, depending on the settings of the user's machine, Excel by default disables the macro. This ended up opening and revealing the contents in the xls file. </p>
  
  <p>How can I make sure that the user has to accept running the macro or Excel will close the workbook?</p>