Wwise SDK

Handle of the window associated with the audio. Each game must specify the HWND of the application for device detection purposes. The value returned by GetDefaultPlatformInitSettings is the foreground HWND at the moment of the initialization of the sound engine and might not be the correct one for your game. Each game must provide the correct HWND to use.

AkWinSoundEngine.h の 47 行目に定義があります。