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# XTaskQueueRegistrationToken

> XTaskQueueRegistrationToken

A token returned when registering a callback, to identify the registration.

## Syntax

```cpp theme={null}
typedef struct XTaskQueueRegistrationToken {  
    uint64_t token;  
} XTaskQueueRegistrationToken  
```

### Members

*token*\
Type: uint64\_t

The token returned when registering a callback to identify the registration.

## Remarks

`XTaskQueueRegistrationToken` represents a *registration token*, returned when registering a callback for a task queue. Use the registration token when un-registering a previously-registered callback. Registration tokens are unique only within the scope of the callback for which you are registering.

`XTaskQueueRegistrationToken` is used by the following functions:

| Header | Function |
| - | - |
| [XAppCapture](https://docs.xbox.com/reference/system/xappcapture/xappcapture_members.md) | [XAppBroadcastRegisterIsAppBroadcastingChanged](https://docs.xbox.com/reference/system/xappcapture/functions/xappbroadcastregisterisappbroadcastingchanged.md) |
| [XAppCapture](https://docs.xbox.com/reference/system/xappcapture/xappcapture_members.md) | [XAppBroadcastUnregisterIsAppBroadcastingChanged](https://docs.xbox.com/reference/system/xappcapture/functions/xappbroadcastunregisterisappbroadcastingchanged.md) |
| [XAppCapture](https://docs.xbox.com/reference/system/xappcapture/xappcapture_members.md) | [XAppCaptureRegisterMetadataPurged](https://docs.xbox.com/reference/system/xappcapture/functions/xappcaptureregistermetadatapurged.md) |
| [XAppCapture](https://docs.xbox.com/reference/system/xappcapture/xappcapture_members.md) | [XAppCaptureUnRegisterMetadataPurged](https://docs.xbox.com/reference/system/xappcapture/functions/xappcaptureunregistermetadatapurged.md) |
| [XGameInvite](https://docs.xbox.com/reference/system/xgameinvite/xgameinvite_members.md) | [XGameInviteRegisterForEvent](https://docs.xbox.com/reference/system/xgameinvite/functions/xgameinviteregisterforevent.md) |
| [XGameInvite](https://docs.xbox.com/reference/system/xgameinvite/xgameinvite_members.md) | [XGameInviteUnregisterForEvent](https://docs.xbox.com/reference/system/xgameinvite/functions/xgameinviteunregisterforevent.md) |
| [XNetworking](https://docs.xbox.com/reference/networking/xnetworking/xnetworking_members.md) | [XNetworkingRegisterConnectivityHintChanged](https://docs.xbox.com/reference/networking/xnetworking/functions/xnetworkingregisterconnectivityhintchanged.md) |
| [XNetworking](https://docs.xbox.com/reference/networking/xnetworking/xnetworking_members.md) | [XNetworkingRegisterPreferredLocalUdpMultiplayerPortChanged](https://docs.xbox.com/reference/networking/xnetworking/functions/xnetworkingregisterpreferredlocaludpmultiplayerportchanged.md) |
| [XNetworking](https://docs.xbox.com/reference/networking/xnetworking/xnetworking_members.md) | [XNetworkingUnregisterConnectivityHintChanged](https://docs.xbox.com/reference/networking/xnetworking/functions/xnetworkingunregisterconnectivityhintchanged.md) |
| [XNetworking](https://docs.xbox.com/reference/networking/xnetworking/xnetworking_members.md) | [XNetworkingUnregisterPreferredLocalUdpMultiplayerPortChanged](https://docs.xbox.com/reference/networking/xnetworking/functions/xnetworkingunregisterpreferredlocaludpmultiplayerportchanged.md) |
| [XPackage](https://docs.xbox.com/reference/system/xpackage/xpackage_members.md) | [XPackageRegisterInstallationProgressChanged](https://docs.xbox.com/reference/system/xpackage/functions/xpackageregisterinstallationprogresschanged.md) |
| [XPackage](https://docs.xbox.com/reference/system/xpackage/xpackage_members.md) | [XPackageRegisterPackageInstalled](https://docs.xbox.com/reference/system/xpackage/functions/xpackageregisterpackageinstalled.md) |
| [XPackage](https://docs.xbox.com/reference/system/xpackage/xpackage_members.md) | [XPackageUnregisterInstallationProgressChanged](https://docs.xbox.com/reference/system/xpackage/functions/xpackageunregisterinstallationprogresschanged.md) |
| [XPackage](https://docs.xbox.com/reference/system/xpackage/xpackage_members.md) | [XPackageUnregisterPackageInstalled](https://docs.xbox.com/reference/system/xpackage/functions/xpackageunregisterpackageinstalled.md) |
| [XStore](https://docs.xbox.com/reference/system/xstore/xstore_members.md) | [XStoreRegisterGameLicenseChanged](https://docs.xbox.com/reference/system/xstore/functions/xstoreregistergamelicensechanged.md) |
| [XStore](https://docs.xbox.com/reference/system/xstore/xstore_members.md) | [XStoreRegisterPackageLicenseLost](https://docs.xbox.com/reference/system/xstore/functions/xstoreregisterpackagelicenselost.md) |
| [XStore](https://docs.xbox.com/reference/system/xstore/xstore_members.md) | [XStoreUnregisterGameLicenseChanged](https://docs.xbox.com/reference/system/xstore/functions/xstoreunregistergamelicensechanged.md) |
| [XStore](https://docs.xbox.com/reference/system/xstore/xstore_members.md) | [XStoreUnregisterPackageLicenseLost](https://docs.xbox.com/reference/system/xstore/functions/xstoreunregisterpackagelicenselost.md) |
| [XTaskQueue](https://docs.xbox.com/reference/system/xtaskqueue/xtaskqueue_members.md) | [XTaskQueueRegisterMonitor](https://docs.xbox.com/reference/system/xtaskqueue/functions/xtaskqueueregistermonitor.md) |
| [XTaskQueue](https://docs.xbox.com/reference/system/xtaskqueue/xtaskqueue_members.md) | [XTaskQueueRegisterWaiter](https://docs.xbox.com/reference/system/xtaskqueue/functions/xtaskqueueregisterwaiter.md) |
| [XTaskQueue](https://docs.xbox.com/reference/system/xtaskqueue/xtaskqueue_members.md) | [XTaskQueueUnregisterMonitor](https://docs.xbox.com/reference/system/xtaskqueue/functions/xtaskqueueunregistermonitor.md) |
| [XTaskQueue](https://docs.xbox.com/reference/system/xtaskqueue/xtaskqueue_members.md) | [XTaskQueueUnregisterWaiter](https://docs.xbox.com/reference/system/xtaskqueue/functions/xtaskqueueunregisterwaiter.md) |
| [XUser](https://docs.xbox.com/reference/system/xuser/xuser_members.md) | [XUserRegisterForChangeEvent](https://docs.xbox.com/reference/system/xuser/functions/xuserregisterforchangeevent.md) |
| [XUser](https://docs.xbox.com/reference/system/xuser/xuser_members.md) | [XUserRegisterForDefaultAudioEndpointUtf16Changed](https://docs.xbox.com/reference/system/xuser/functions/xuserregisterfordefaultaudioendpointutf16changed.md) |
| [XUser](https://docs.xbox.com/reference/system/xuser/xuser_members.md) | [XUserRegisterForDeviceAssociationChanged](https://docs.xbox.com/reference/system/xuser/functions/xuserregisterfordeviceassociationchanged.md) |
| [XUser](https://docs.xbox.com/reference/system/xuser/xuser_members.md) | [XUserUnregisterForChangeEvent](https://docs.xbox.com/reference/system/xuser/functions/xuserunregisterforchangeevent.md) |
| [XUser](https://docs.xbox.com/reference/system/xuser/xuser_members.md) | [XUserUnregisterForDefaultAudioEndpointUtf16Changed](https://docs.xbox.com/reference/system/xuser/functions/xuserunregisterfordefaultaudioendpointutf16changed.md) |
| [XUser](https://docs.xbox.com/reference/system/xuser/xuser_members.md) | [XUserUnregisterForDeviceAssociationChanged](https://docs.xbox.com/reference/system/xuser/functions/xuserregisterfordeviceassociationchanged.md) |

## Requirements

**Header:** XTaskQueue.h

**Supported platforms:** Windows, XBOX One family consoles and XBOX Series consoles

## See also

[XTaskQueue members](https://docs.xbox.com/reference/system/xtaskqueue/xtaskqueue_members.md)\
[Asynchronous Programming Model](https://docs.xbox.com/build/core-features/common/async/async-programming-model.md)\
[Async Task Queue design](https://docs.xbox.com/build/core-features/common/async/async-task-queue-design.md)


## Related topics

- [XTaskQueueUnregisterWaiter](https://docs.xbox.com/reference/system/xtaskqueue/functions/xtaskqueueunregisterwaiter.md)
- [XTaskQueueUnregisterMonitor](https://docs.xbox.com/reference/system/xtaskqueue/functions/xtaskqueueunregistermonitor.md)
- [XTaskQueue (API contents)](https://docs.xbox.com/reference/system/xtaskqueue/xtaskqueue_members.md)
- [XTaskQueueRegisterMonitor](https://docs.xbox.com/reference/system/xtaskqueue/functions/xtaskqueueregistermonitor.md)
- [XTaskQueueRegisterWaiter](https://docs.xbox.com/reference/system/xtaskqueue/functions/xtaskqueueregisterwaiter.md)