title: How do I use an excel function inside a custom function defined in VBA?
body: <p>How do I use an excel function inside a custom function defined in VBA?</p>
  
  <p>I want a custom round function that acts like MRound and RoundDown. To round to the nearest 25 millionths.</p>
  
  <pre><code>Public Function MRoundDown(Num As Double) As Double
  
  Num = Num * 40000
  Num = RoundDown(Num, 0)
  Num = Num / 40000
  
  End Function
  </code></pre>