I am using the GlyphReader  OCR engine - my questions is: can the ocr engine report back to me the rotation of a page. The engine/encoder correctly rotates the page during output to PDF if I set the appropriate property on the PDF encoder - but I want some method to rotate a page as it is scanned in - my plan is to peform some quick ocr on a region and hopefully have some way of getting something back from the engine to tell what its current rotation is so I can correct it in the WorkspaceViewer.

When the OnImageTransformation event is called it passes you preprocessingArgs. This will contain the rotated image. What you can do is cancel the OCR engine process via progressArgs.Cancel and then take this image and use it for your own purposes