# WVRCallbackFunc

## Definition

  `#include <nitro/wvr.h>`

      typedef void ( *WVRCallbackFunc )(  void *arg , WVRResult result  );

## Arguments

arg | This is the argument designated when an asynchronous function is called.
result | This is the value of `WVRResult` enumerated type, which shows the results of the asynchronous process.

## Return Values

None.

## Description

This is the format of the user callback function called when the asynchronous process started by the WVR asynchronous operation function completes. It takes an optional value designated when the asynchronous process starts, or the processing results as its argument.

## Revision History

2005/02/16 Initial version.

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