How to extract images from PDF file through VB.Net

[Nitesh.Patel@adobeforums.com]

I am developing a desktop application in VB.Net. I need to extract images from the PDF file. I am using Adobe Acrobat 7.0.5 SDK. I have written following code, however, it is throwing an error when I execute PDFJS.dataObjects.

Dim PDFApp As Acrobat.CAcroApp
Dim PDFAVDoc As Acrobat.CAcroAVDoc

Dim PDFFilePath As String
Dim PDFDoc As Acrobat.CAcroPDDoc
Dim PDFJS As Object

Dim Obj As Object
Dim objs() As Object

Dim NoOfPages As Integer
Dim i As Integer

PDFFilePath = Application.StartupPath & "\Sample.pdf"

Try
PDFApp = CreateObject("AcroExch.App")
PDFApp.Show()

PDFAVDoc = CreateObject("AcroExch.AVDoc")
PDFAVDoc.Open(PDFFilePath, "Test Application")

PDFDoc = PDFAVDoc.GetPDDoc

PDFJS = PDFDoc.GetJSObject
NoOfPages = PDFJS.numPages

objs = PDFJS.dataObjects
'This statement throwing an error – Public
'member 'dataObjects' on type '_ComObject' not found.

If Not objs Is Nothing Then
For i = 0 To objs.Length - 1
Obj = PDFJS.getDataObject(objs(i).name)
If Obj Is Nothing Then
If TypeOf (Obj) Is Bitmap Then
'If type if obj is bitMap then Save this
'object as .jpeg, .tiff, etc.
End If
End If
Next
End If
PDFAVDoc.Close(0)

Catch ex As Exception
MessageBox.Show(ex.Message)
Finally
If Not PDFApp Is Nothing Then
PDFApp.CloseAllDocs()
PDFApp.Exit()
End If
End Try

I am developing this application on Windows XP Professional edition.

Is there any other way to extract images from PDF file?

Thanks,
Nitesh

[Aandi_Inston@adobeforums.com]

Are you assuming that "dataobjects" corresponds to the objects on the
page? It doesn't. There is no JavaScript or IAC method that gives you
access to page contents in this way.

Aandi Inston

[Nitesh.Patel@adobeforums.com]

Is there any other way to get objects on the page?

[Aandi_Inston@adobeforums.com]

Only through the plug-in API. Plug-ins are written in Visual C++, with
C or C++, and are not separate applications.

Aandi Inston

[Aandi_Inston@adobeforums.com]

By the way, I'd very strongly recommend reading the PDF Reference
before considering any kind of extraction. So you know what is in
there.

Aandi Inston