Hello, I want to provide a piece of information to the caller of my library to identify all interfaces linked with a single USB device. For example, if I take the mixer component: I want to either return the mixer index (so he can pass it in mixerOpen()), or a name that could match the string in szPname inside the MIXERCAPS structure (mixerGetDevCaps). So far, I've been able to enumerate all MIDI symbolic link and get their friendly name. However, when I have 2 devices with the same VID and PID, the friendly name is exactly the same. While when I look to the list mixer name they do have a different name "Mixer Device" and "Mixer Device (2)". So far, I deal with some SetupDi... functions to enumerate all devices in a category. I also, kind of reverse-engineer the GUID I need for the enumeration by looking to the registry under "Local_Machine\System\CurrentControlSet\Control\DeviceClasses\". Maybe there is a .h file I should look to have a proper list of these GUID? Currently, I though to assume that the MIDI, Wave, Mixer, DirectSound interface name would be the same, since they look the same under XP. But I heard, that some customization of these name would be possible under Vista? So, I guess it's better to get single piece of information for every type of interface? regards, -_- Impress -_- ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.com/