Stream is an abstract class, you have to use one of it's implementations. You can create a MemoryStream from a byte array, and you can get the data from a MemoryStream as a byte array. The size of a stream is determined from the data that it contains. You change the size of a stream by writing to it. --- b { font-weight: normal; }

Don't know if WMI will be of any help, but in general there are no built-in classes for this in the framework. You could look into managed DirectX or use p/invoke to call the waveIn*, waveOut* and mixer* functions from winmm.dll. Regards, mav -- Black holes are the places where God divided by 0...

Hi, I have a partial answer to your question: store the sound data in a byte array, pin it in memory, and call the unmanaged function [DllImport("Winmm.dll", CallingConvention=CallingConvention.Cdecl)] static extern int sndPlaySound(IntPtr buffer, int dwFlags); with flag value = 4 (= SND_MEMORY) More on this in http://www.bobpowell.net/playsnd.htm[^] Dont know about capturing sounds though. Luc Pattyn