Converting PowerPoint Presentations to JPEG for Visual Basic.NET

'----------------------------------------------------------------------
' 1) Microsoft PowerPoint 97 or above should be installed and activated on your PC.
'
' 2) Universal Document Converter 5.2 or above should be installed, too.
'
' 3) Open your project in Microsoft Visual Basic.NET.
'
' 4) In Visual Basic main menu press "Project->Add Reference...".
'
' 5) In "Add Reference" window go to "COM" tab and double click into 
'    "Universal Document Converter Type Library".
'----------------------------------------------------------------------

Private Sub PrintPowerPointToJPEG(ByVal strFilePath As String)
    Dim objUDC As UDC.IUDC
    Dim itfPrinter As UDC.IUDCPrinter
    Dim itfProfile As UDC.IProfile
    Dim objPPTApp As Object
    Dim itfPresentation As Object
    Dim nSlides As Long
    objUDC = New UDC.APIWrapper
    itfPrinter = objUDC.Printers("Universal Document Converter")
    itfProfile = itfPrinter.Profile
    ' Use Universal Document Converter API to change settings of converterd document
    itfProfile.PageSetup.ResolutionX = 300
    itfProfile.PageSetup.ResolutionY = 300
    itfProfile.PageSetup.Orientation = UDC.PageOrientationID.PO_LANDSCAPE
    itfProfile.FileFormat.ActualFormat = UDC.FormatID.FMT_JPEG
    itfProfile.FileFormat.JPEG.ColorSpace = UDC.ColorSpaceID.CS_TRUECOLOR
    itfProfile.Adjustments.Crop.Mode = UDC.CropModeID.CRP_AUTO
    itfProfile.OutputLocation.Mode = UDC.LocationModeID.LM_PREDEFINED
    itfProfile.OutputLocation.FolderPath = "C:\Out"
    itfProfile.OutputLocation.FileName = "&[DocName(0)] -- page &[Page(3)].&[ImageType]"
    itfProfile.OutputLocation.OverwriteExistingFile = False
    itfProfile.PostProcessing.Mode = UDC.PostProcessingModeID.PP_OPEN_FOLDER
    ' Run Microsoft PowerPoint as COM-server
    On Error Resume Next
    objPPTApp = CreateObject("PowerPoint.Application")
    ' Open document from file
    itfPresentation = objPPTApp.Presentations.Open(strFilePath, 1, 1, 0)
    ' Get number of slides in the presentation
    nSlides = itfPresentation.Slides.Count
    If nSlides > 0 Then
        ' Print all slides from the presentation
        itfPresentation.PrintOptions.PrintInBackground = 0
        itfPresentation.PrintOptions.ActivePrinter = "Universal Document Converter"
        Call itfPresentation.PrintOut()
    End If
    ' Close the presentation
    Call itfPresentation.Close()
    itfPresentation = Nothing
    ' Close Microsoft PowerPoint
    Call objPPTApp.Quit()
    objPPTApp = Nothing
End Sub