I have written a WIA driver for a scanner. When I scan using the WIA scanner
wizard, I can prescan and select the area I want to scan. The precan look
very nice. If I scan to a file I have to set the height field in th
BITMAPINFOHEADER negative, or else my scan will be upside down. I can live
with that. But, when scanning directly to memory, eg. through the WIA TWAIN
driver I have no way of doing a similar trick with the height field. So my
scans are all opside down when acquired through the Microsoft supplied WIA
TWAIN driver.
How do I avoid this in my WIA driver? There is a header for memory
transfers, which is not documented - as far as I can see. Is it possible to
set the height field in that header?

regards,
Chr.