 field names of the linked dataset.</p>
<p>Here is a sample:</p>
<p><img src="images/datalink.jpg" width="547" height="497"></p>
<p><img src="images/datalink2.jpg" width="547" height="497"></p>
<p>When you assign a main dataset to a subreport, this subreport, prints the details 
  once for each record. So while printing a subreport, if the main dataset has 
  a linked query , it will be updated, for example if the custno field in the 
  main dataset changes and the linked query is parametrized with this fie