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# OnOptionsChanged Method of the IImageViewerEvents Interface

> OnOptionsChanged 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 the option have been changed in [Image Viewer](/fine-reader/engine/visual-components-reference/imageviewer). Options are specified in the Options dialog box, which is displayed if the [MI\_Options](/fine-reader/engine/visual-components-reference/imageviewer/image-viewer-commands#mi_options) command is called.

It informs the client that the options have been changed.

## Syntax

### C++

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

### C\#

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

### Visual Basic .NET

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

## 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)