Hi, > up two MIDI devices with different capabilities, doesn't MIDI have > custom messages for reporting capabilities so you can tell the > difference that way? And if you connect up two identical No, MIDI doesn't have anything like that. > MIDI devices, > why would it matter? Yes it does, because I don't think Windows will let you connect two Identical devices, and load the driver for them and still be able To distinguish between them (correct me if I'm wrong here). > If they have serial numbers, you should be able to get the > serial number > from the device name using the SetupDi APIs. Ok... Does anyone have a link to some information or can explain how Windows XP SP1 and SP2 treat multiple identical USB devices? Thanks, Bert ****************** 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.de/