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# OnEditorBlockChanged Method of the ITextEditorEvents Interface

> OnEditorBlockChanged method of the ITextEditorEvents Interface in ABBYY FineReader Engine Visual Components on Windows — This method is implemented on the client-side.

This method is implemented on the client-side. It is called by ABBYY FineReader Engine after cursor position has been changed in [Text Editor](/fine-reader/engine/visual-components-reference/imageviewer).

It delivers to the client the index of the block and the cell in the block, where the cursor is currently located.

## Syntax

### C++

```cpp theme={null}
HRESULT OnEditorBlockChanged(
  int BlockIndex,
  int CellIndex,
);
```

### C\#

```csharp theme={null}
void OnEditorBlockChanged(
  int BlockIndex,
  int CellIndex,
);
```

### Visual Basic .NET

```vb theme={null}
Sub OnEditorBlockChanged( _
  BlockIndex As Integer, _
  CellIndex As Integer _
)
```

## Parameters

BlockIndex

\[in] Contains the index of the block. The index is in the [ILayout::VisualBlocks](/fine-reader/engine/api-reference/layout-related-objects/layout#visualblocks) collection.

CellIndex

\[in] Contains the index of the cell in the table block.

## Return values

This method has no specific return values. It returns the [standard return values of ABBYY FineReader Engine functions](/fine-reader/engine/api-reference/return-codes).

## Remarks

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

[ITextEditorEvents](/fine-reader/engine/visual-components-reference/itexteditorevents)