ImageGear for C and C++ on Windows v21.0 - Updated
API Reference Guide / TWAIN Component API Reference / TWAIN Component Enumerations / enumIGTWAINClearBuffers
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    enumIGTWAINClearBuffers
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    This enumeration determines the type of buffer clearing process.

    Values:

    IG_TW_CB_AUTO Causes the Source to automatically clear the buffers.
    IG_TW_CB_CLEAR Causes the Source to immediately clear its buffers.
    IG_TW_CB_NOCLEAR Causes the Source to preserve images in the buffers.