Access Windows Sound?

I'd like to know a couple of things: 1.) How do I check how 开发者_如何学JAVAmuch noise / how loud all noises coming from the computer (Windows) are? 2.) How do I adjust the Windows volume?

Thanks!

waveOutGetVolume: http://msdn.microsoft.com/en-us/library/dd743864(VS.85).aspx
waveOutSetVolume: http://msdn.microsoft.com/en-us/library/dd743874(v=VS.85).aspx

See this knowledgebase article: http://support.microsoft.com/kb/139098