This enumeration determines which flash the image was acquired to use.
Values:
| IG_TW_FL_AUTO | Auto flash. |
| IG_TW_FL_NONE | No flash. |
| IG_TW_FL_OFF | Flash is off. |
| IG_TW_FL_ON | Flash is on. |
| IG_TW_FL_REDEYE | Redeye flash. |
| ImageGear Professional DLL v17.1 for Windows |  |
| enumIGTWAINFlashUsed | |
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| ImageGear Professional DLL v17.1 for Windows > API Reference Guide > TWAIN Component API Reference > TWAIN Component Enumerations > enumIGTWAINFlashUsed |