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# OnPagesSelectionChanged Method of the IImageViewerEvents Interface

> OnPagesSelectionChanged method of the IImageViewerEvents 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 page selection has been changed in the Image Editor dialog box of [Image Viewer](/fine-reader/engine/visual-components-reference/imageviewer).

It informs the client that page selection has been changed.

## Syntax

### C++

```cpp theme={null}
HRESULT OnPagesSelectionChanged();
```

### C\#

```csharp theme={null}
void OnPagesSelectionChanged();
```

### Visual Basic .NET

```vb theme={null}
Sub OnPagesSelectionChanged()
```

## 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

[IImageViewerEvents](/fine-reader/engine/visual-components-reference/iimageviewerevents)