Copying pictures from inside an iFrame in webbrowser control - vb.net

Question

I used the code below to successfully get a copy of each picture inside a page loaded using webbrowser control.
Dim doc As IHTMLDocument2 = DirectCast(wb.Document.DomDocument, IHTMLDocument2)
Dim imgRange As IHTMLControlRange = DirectCast(DirectCast(doc.body, HTMLBody).createControlRange(), IHTMLControlRange)
For Each img As IHTMLImgElement In doc.images
imgRange.add(DirectCast(img, IHTMLControlElement))
imgRange.execCommand("Copy", False, Nothing)
Using bmp As Bitmap = DirectCast( _
Clipboard.GetDataObject().GetData(DataFormats.Bitmap), Bitmap)
bmp.Save(img.nameProp)
End Using
Next
I got the code from here: Copy an image from cache of web browser control present in VB.NET
However, the picture I am interested in is inside an iFrame.
I tried changing:
Dim doc As IHTMLDocument2 = DirectCast(wb.Document.DomDocument, IHTMLDocument2)
to
Dim doc As IHTMLDocument2 = DirectCast(wb.Document.Window.Frames(iFrameID).Document.DomDocument, IHTMLDocument2)
but I am getting an "Access Denied" Error. I guess (not sure) its because the iframe's src is on a different domain.
Is there a way around this problem?
Thanks!

Answer 1

If the iFrame has content from a domain that is different from the the parent then your out of luck. You could attempt a different solution and retrieve the iFrame's page via Ajax and parse out the image src. Another alternative is to do it server side with a program like PhantomJs (or VB, PHP etc) to retrieve the page and parse it for images to retrieve.