Capture/Record windows sound

I need to record the sounds on windows. I need to write to stream what I hear from speake开发者_StackOverflow中文版rs. What means/API can I rely on?

You may be able to make use of DirectSound; a sample can be found here which is working against a mic. The CaptureDevicesCollection should have a reference to the needed device you want to capture audio from to change from a mic to something else.