title: Validating date format
body: <p>Anybody knows how to validate date format in the format of <code>mm/dd/yyyy</code>.
  I have tried this code but is not working.</p>
  
  <p>In the userform:</p>
  
  <pre><code>dateCheck (txtStartDate)
  </code></pre>
  
  <p>In module:</p>
  
  <pre><code>Function dateCheck(dateValue As Date) As Boolean
      If CDate(dateValue) &lt;&gt; "mm/dd/yyyy" Then
          MsgBox "Please use the mm/dd/yyyy  date format!"
          dateCheck = True
      End If
  End Function
  </code></pre>
  
  <p>Am I on the right track? Thanks!</p>