Sound::SetVolumeVariationCompletionCallback

Installs a completion callback function that is invoked when a volume variation has completed.

void SetVolumeVariationCompletionCallback(VariationCallback *callback, void *cookie = nullptr);

callback	The volume variation completion callback function. This parameter may be nullptr, in which case the sound has no volume variation completion callback function.
cookie	The cookie that is passed to the volume variation completion callback function as its last parameter.

The SetVolumeVariationCompletionCallback function installs a completion callback function that is invoked every time that a volume variation operation completes for the sound for which it is installed. The VariationCallback type is defined as follows.

typedef void VariationCallback(Sound *, void *);

When the function pointed to by the callback parameter is called, the pointer to the sound object and the value supplied in the cookie parameter are passed to it. By default, there is no volume variation completion callback function installed.

Sound::VaryVolume

Sound::VolumeVarying

Sound::SetFrequencyVariationCompletionCallback