title: While a cell is selected in a specific column do something when not error msg
body: <p>Hello am trying to do a code like below</p>
  
  <pre><code>Do while (the selected cell is in the column b)
  Code...
  
  End Loop
  Message error
  </code></pre>
  
  <p>When I click the button when the selected cell is not in the column b want to appear error msg</p>