title: PowerBuilder Describe method with Evaluate expression vs. GetItem... (GetItemString, ...) DataWindow methods
body: <p>Is there any significant performance difference between using of <strong>Describe</strong> method with <strong>Evaluate expression</strong> in DataWindow control and <strong>GetItem...</strong> (GetItemString, GetItemDate, GetItemNumber, ...) DataWindow methods?</p>
  
  <pre><code>l_s_ret = l_dw.Describe("Evaluate(~"" + a_s_expression + "~", " + String(a_l_rownumber) + ")")
  
  l_s_ret = l_dw.GetItemDecimal(a_l_rownumber, a_s_expression)
  </code></pre>
  
  <p>I would like to have one function to get some data from DataWindow control by Describe method with Evaluate expression instead of using GetItem... method for specific data types.</p>
  
  <p>Thanks in advance for your answers.</p>