sorry for posting this message although i posted one before...i found STI in MSDN library but don't know how to actualy write something coz there are no examples but for now, i am just wondering if i am on right track. i explored MSDN and found out what i think are more ways to handle the scanner functions (like display image and save if needed) in Win32 C based applications. one is with WIA microdriver and other trough still image (STI)... any advice would be helpfull..thanks guys