用MMC(Multimedia MCI)实现音量调节

Question

try use 
waveOutGetVolume 
waveOutSetVolume

Answer 1

波形设备命令字符串
capability waveaudio<arg> ......can eject,can play,can record,can save,compounddevice,device type,has audio,has video,inputs,outputs,uses files
close waveaudio
cue waveaudio<arg>.......input,output
delete waveaudio<arg>....from position,to position
info waveaudio <arg>......input,file,output,product
open waveaudio<arg>.......alias name,buffer size,shareable
pause waveaudio
play waveaudio<arg>.......from position,to position,fast,repeat,reverse,slow
record waveaudio<arg>.....insert,from position,to position,overwrite
resume waveaudio
save waveaudio<arg>.......[filename]
seek waveaudio<arg> .......to position,to start,to end
set waveaudio<arg>.........any input,any output,audio all off,audio all on,audio left on/off,audio right on/off
                            channels number
status waveaudio<arg>......channels,current track,format tag,input,length
                           length track number,number of tracks ,output,position,position track number
stop waveaudioThe End