This browser is no longer supported.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(128, 8%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
My app calls DeviceInformation.CreateWatcher() with DeviceInformationKind.AssociationEndpoint. After the watcher is started it returns endpoints with System.Devices.Aep.ProtocolId
set to known protocols such as
And this, which isn't documented anywhere -
{9f73fafd-2343-4bf9-a532-ad20e2674bea}
What protocol is that?
A Microsoft platform for building and publishing apps for Windows devices.
Could you please share more detailed information about this? It will be better if you could share the code that you are using. Also, could you please tell me what device you are using for testing protocol ID?
string[] properties = new[] { _deviceAddress,
_category,
_manufacturuer,
_nameDisplay,
_protocolId,
_aepContainerId,
_aepId,
};
_deviceWatcher = DeviceInformation.CreateWatcher("", properties, DeviceInformationKind.AssociationEndpoint);
_deviceWatcherHelper.StartWatcher(_deviceWatcher);
Where _protocolId is "System.Devices.Aep.ProtocolId". The device of interest is a printer for which I get:
System.Devices.Aep.DeviceAddress for (3) is http://192.168.x.x:631/ipp/print, which corresponds to what we would expect from DNS-SD, but in that case the protocol id should be 4526e8c1-8aac-4153-9b16-55e86ada0e54
Could you please tell me what printer you are using? Also, do you have other printers to test?
Using:
Canon G5000 Series
Canon G6000 Series
Canon TS9000 Series
Canon MF240 Series
All of these support both WSD and IPP printing.
I think I found it. Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Device Association Framework\InboxProviders\ contains all the protocols listed here:
Plus several more, including IPP, that contains a protocol ID=9f73fafd-2343-4bf9-a532-ad20e2674bea. So it must mean the endpoint is an IPP printer.
Glad to hear that. It's really appreciated to share the information here. Having a good day.