title: Export Datawindow to excel in powerbuilder
body: <p>I want to export all columns in a data window to excel in power builder.
  After I select All the data displayed in a window, then I should export them to excel.</p>
  
  <pre><code>    e.g integer li_ret
  
  li_ret = exporttoexcel(dw_excel, 'c:\doc\datawindow.xls')
  if li_ret = 1 then
     return 0
  else
     return -1
  end if
  </code></pre>