#include "ltdoc2.h"

L_BOOL pEXT_CALLBACK YourFunction(pProgressData, pUserData)

Reports the progress of a specific operation and offers an opportunity to cancel. The address of this callback is passed as an argument to the L_Doc2SetProgressCB / L_Doc2SetProgressCBExt function.


pPROGRESSDATA2 pProgressData

Pointer to a PROGRESSDATA2 structure containing progress data for the current process.

L_VOID * pUserData

A void pointer to access a variable or structure containing data that PROGRESSCALLBACK2 needs. This gives you a way to receive data indirectly from the function that uses PROGRESSCALLBACK2. (This is the same pointer that you pass in the pUserData parameter of the L_Doc2SetProgressCB function.)

Keep in mind that this is a void pointer, which must be cast to the appropriate data type within your callback function.


Value Meaning
SUCCESS The function was successful.
< 1 An error occurred. Refer to Return Codes.


PROGRESSCALLBACK2 is called periodically by the OCR engine.

To activate the progress callback function, call L_Doc2SetProgressCB / L_Doc2SetProgressCBExt.

Required DLLs and Libraries

Help Version 21.0.2021.4.7
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2021 LEAD Technologies, Inc. All Rights Reserved.

LEADTOOLS OCR Module - OmniPage Engine C API Help