title: ISBLANK returns False for empty cells having Formulas
body: <p>In Excel 2016, a cell with formula which is not yet calculated appears blank. But still ISBLANK returns False.</p>
  
  <p>I am trying to find a way to return True for the cell having formula which is not yet calculated and is actually Blank. </p>
  
  <p>Can someone help me please.</p>
  
  <p>Thanks in Advance!</p>