title: What Excel VBA actions are possible on hidden worksheets or workbooks?
body: <p>Hidden worksheets/workbooks have some limitations to what can be done in VBA code, like most <code>Select</code> and <code>Selection</code> statements, and anything coming from <code>ActiveSheet</code>, but I can't seem to find any list of what the limitations are.</p>
  
  <p>Google, the built-in documentation in the help system, and MSDN's website have all failed me.  Can anyone point me in the right direction?</p>
  
  <p>Edit:
  The workbook is opened with </p>
  
  <pre><code>Set WB_Master = Workbooks.Open(Filename:=PATH_Master, ReadOnly:=False)
  </code></pre>
  
  <p>and then hidden with </p>
  
  <pre><code>WB_Master.Windows(1).Visible = False
  </code></pre>