OnProgress Method of the IAsyncProcessingCallback Interface

This method is implemented on the client-side. It is called by ABBYY FineReader Engine during processing with Batch Processor. Its implementation may process any Windows messages to avoid an effect that the application "is not responding" during long processing operations. The method allows you to cancel the operation.



HRESULT OnProgress( VARIANT_BOOL* Cancel );


void OnProgress( ref bool Cancel );

Visual Basic .NET

Sub OnProgress( ByRef Cancel As Boolean )


[in, out] You may set this variable to TRUE to indicate that the process should be terminated. In this case, the processing function returns E_ABORT.

Return values

[C++ only] If this method returns a value other than S_OK, it indicates that an error occurred on the client-side, and in this case the value of the Cancel parameter is not taken into account.


The client implementation of this method must assure that all exceptions thrown inside the method are caught and handled and no exceptions are propagated outside the method. Propagation of an exception outside the method may lead to unpredictable results (such as program termination).

See also



03.07.2024 8:50:43

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