This callback, if registered, will be called by ImageGear before any of the pages of a document have been retrieved, processed and/or saved.
Declaration:
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typedef LONG (LPACCUAPI LPFNIG_TWAIN_BEFORE_DOC)(
LPVOID lpData
);
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Arguments:
| Name | Type | Description |
| lpData | LPVOID | A far pointer to private data, as specified in your call to IG_TWAIN_CB_register() function. |
Return Value:
Return 1 if you want to continue scanning; return 0 to cancel scanning.
Supported Raster Image Formats:
This function does not process image pixels.