- Topics - 3
- Replies - 66
- Total Posts - 69
The application drives the TWAIN state, not the scanner’s DS. In the scenario you mentioned, your app can transfer 2 color scans, transition back to TWAIN state 4, renegotiate capabilities for a B/W scan, and then start the scan.
Please see the TWAIN specification for details. If you’re still stuck after digging into the spec, we’re here to help.