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The default settings of HP scanner would enable Scan Preview and take 200DPI as default resolution, this can be modified in HP scanner software by disable Scan Preview and change current resolution to other values(e.g 75 DPI). But when the application start scan through Twain, it still takes the defalut settings: take Scan Preview and reslution as 200DPI.
How can I set in Twain API so the application will take the scanner current settings rather than defalut setting? thanks.
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