title: NDde implement DDE Server, Excel DDE can't update when server advise
body: <p>theres
   I use <a href="http://ndde.codeplex.com/" rel="nofollow">NDde</a> to create a DDE Server to support EXCEL client, 
   U use a timer to set item's value in the server periodically, 
   why Excel not change automatically when the item value changed ?
   But the first time the data will display when I input App|Topic!'item' in the cell
   Why ? any idea ?</p>
  
  <p>Regards,
  agichen</p>