Hi
The way how to handle this is described in the Kodak integrations documetation delived with the scanner.
There is a document named “TWAIN_DualStream.htm” where it’s described how to check the cap’s in order to know if “DualStream” is activated. You can get for front and back if color and/or bitonal is enabled.
There is also described how to handle the filetransfer in order to know before you start transfer what image you’ll get (front, back, color, bitonal) and the document where they comes from.
Hopefully these information helps.
Regards
Gerard