title: Excel add-in needs to run automatically at workbook startup
body: <p>I need to make an Excel add-in active/run at workbook startup....need code. The add-in with parameter is:  "OPCS7200ExcelAddin.XLA!StartOPC"</p>
  
  <p>Have been given this code:  </p>
  
  <pre><code>Private Sub Workbook_Open()
  
      Call Excel.Application.Run("OPCS7200ExcelAddin.XLA!StartOPC")
  
  End Sub
  </code></pre>
  
  <p>But this code does not work.</p>