TWAIN is obviously not understood. It is only for inferiour applications with no 2-way communication with the host (the application) With TWAIN the Plug-in does not know about settings inside the host. That is why the Photoshop plug-in technology or our stand-alone only supply predictable colour. TWAIN has mainly been invented because manufacturers did not know better! My advice: Do not use TWAIN since TWAIN is PAIN!