Hi All, I am search a virtual audio device (with source code) that can work to test. It is said that in the DDK has available some Virtual Audio Device. But i need the one that i can: 1. Copy audio from "real playback device" to this virtual. 2. After step 1, copy the audio from this virtual to "real recording device" .... It is also said that i need to implementation CopyTo and CopyFrom in the DDK virtual audio device sample. But i donot know what to start. So i need for experts help.... Thank so much to any help.