OnDeleteBlocks Method of the IZoomViewerEvents Interface

This method is implemented on the client-side. It is called by ABBYY FineReader Engine before deleting the blocks in Zoom Viewer, if this process has been invoked in one of the following ways:

See the Image Viewer Commands and Zoom Viewer Commands lists to find out how the commands can be called.



HRESULT OnDeleteBlocks(
  IIntsCollection* BlocksToDelete,
  VARIANT_BOOL*    Cancel


void OnDeleteBlocks(
  IIntsCollection BlocksToDelete,
  out bool       Cancel

Visual Basic .NET

Sub OnDeleteBlocks( _
  BlocksToDelete As IIntsCollection, _
  ByRef Cancel As Boolean _


[in] Contains the indices of blocks that have to be deleted as the IntsCollection object.
[out] You may set this variable to TRUE to indicate that the process should be terminated. In this case, the blocks will not be deleted.

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


24.03.2023 8:51:52

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