易语言VISTA系统音量源码,VISTA系统音量,GET_APPCOMMAND_LPARAM,HIWORD,LOWORD,A2W,GetVolumnVista,VolumnUp,VolumnDown,Mute,IsMute,SetVolumnVista,QueryInterface,AddRef,Release,EnumAudioEndpoints,GetDefaultAudioEndpoint,GetDevice,RegisterEndpointN