I am trying to use the UltraWinReportViewer control and cannot find any useful documentation.  I want to load a document at runtime (once a user selects the file).  Here's a code snippet that fails:

PDFReportViewer.RenderSettings.DefinitionUri = New System.Uri(OpenPDFDialog.FileName)

Note: I am trying to load a PDF document. When I dragged and dropped the UltraWinReportVewer control onto my form, it displayed "PDF" by default in the drop down within the toolbar at the bottom.  So, that would indicate to me that it accepts PDF.