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uap4:Extension
Declares an extensibility point for the app.
Element hierarchy
<Package>
└─ <Applications>
└─ <Application>
└─ <Extensions>
└─ <uap4:Extension>
Syntax
<uap4:Extension
Category = 'A required string that can have one of the following values: "windows.sharedFonts", "windows.userDataTaskDataProvider", "windows.mediaCodec", "windows.contactPanel", "windows.loopbackAccessRules", "windows.devicePortalProvider", "windows.printWorkflowBackgroundTask", or "windows.printWorkflowForegroundTask".'
desktop11:AppLifecycleBehavior = 'An optional string that can have one of the following values: "systemManaged", or "unmanaged".'
Executable = 'An optional string between 1 and 256 characters in length that must end with ".exe" and cannot contain these characters: <, >, :, ", |, ?, or *.'
EntryPoint = 'An optional string between 1 and 256 characters in length that cannot start or end with a whitespace character.'
RuntimeType = 'An optional string between 1 and 255 characters in length that cannot start or end with a period or contain these characters: <, >, :, ", /, \, |, ?, or *.'
StartPage = 'An optional string between 1 and 256 characters in length that cannot contain these characters: <, >, :, ", |, ?, or *.'
ResourceGroup = 'An optional alphanumeric string between 1 and 255 characters in length. Must begin with an alphabetic character.'
uap10:TrustLevel = 'An optional string that can have one of the following values: "appContainer", or "mediumIL".'
uap10:RuntimeBehavior = 'An optional string that can have one of the following values: "windowsApp", "packagedClassicApp", or "win32App".'
uap10:HostId = 'An optional alphanumeric string between 1 and 255 characters in length. Must begin with an alphabetic character.'
uap10:Parameters = 'An optional string between 1 and 32767 characters in length with a non-whitespace character at its beginning and end.'
uap11:Id = 'An optional string between 1 and 255 characters in length with a non-whitespace character at its beginning and end.'
uap11:Subsystem = 'An optional string that can have one of the following values: "console", or "windows".'
uap11:SupportsMultipleInstances = 'An optional boolean value.'
uap11:ResourceGroup = 'An optional alphanumeric string between 1 and 255 characters in length. Must begin with an alphabetic character.'
uap11:CurrentDirectoryPath = 'An optional string that cannot contain these characters: <, >, |, ?, or *.'
uap11:Parameters = 'An optional string between 1 and 32767 characters in length with a non-whitespace character at its beginning and end.'
desktop7:CompatMode = 'An optional string that can have one of the following values: "classic", or "modern".'
desktop7:Scope = 'An optional string that can have one of the following values: "machine", or "user".' >
<!-- Child elements -->
uap4:SharedFonts?
uap4:UserDataTaskDataProvider?
uap4:MediaCodec?
uap4:ContactPanel?
uap4:LoopbackAccessRules?
uap4:DevicePortalProvider?
</uap4:Extension>
Key
? optional (zero or one)
Attributes
| Attribute | Description | Data type | Required | Default value |
|---|---|---|---|---|
| Category | The type of extension. | A string that must be one of the following values: windows.sharedFonts, windows.userDataTaskDataProvider, windows.mediaCodec, windows.contactPanel, windows.loopbackAccessRules, windows.devicePortalProvider, windows.printWorkflowBackgroundTask, windows.printWorkflowForegroundTask. | Yes | |
| desktop11:AppLifecycleBehavior | An optional string that can have one of the following values: systemManaged, unmanaged. | No | ||
| Executable | The default launch executable. | An optional string between 1 and 256 characters in length that must end with ".exe" and cannot contain these characters: <, >, :, ", |, ?, or *. | No | |
| EntryPoint | The activatable class ID. | An optional string between 1 and 256 characters in length that cannot start or end with a whitespace character. | No | |
| RuntimeType | The runtime provider. Typically used when there are mixed frameworks in an app. | An optional string between 1 and 255 characters in length that cannot start or end with a period or contain these characters: <, >, :, ", /, , |, ?, or *. | No | |
| StartPage | The web page that handles the extensibility point. | An optional string between 1 and 256 characters in length that cannot contain these characters: <, >, :, ", |, ?, or *. | No | |
| ResourceGroup | A tag that you can use to group extension activations together for resource management purposes (for example, CPU and memory). | An optional alphanumeric string between 1 and 255 characters in length. Must begin with an alphabetic character. | No | |
| uap10:TrustLevel | Specifies the trust level of the extension. | An optional string that can have one of the following values: appContainer, mediumIL. | No | |
| uap10:RuntimeBehavior | Specifies the run time behavior of the extension. | An optional string that can have one of the following values: windowsApp, packagedClassicApp, win32App. | No | |
| uap10:HostId | Specifies the ID of the host runtime for the extension. | An optional alphanumeric string between 1 and 255 characters in length. Must begin with an alphabetic character. | No | |
| uap10:Parameters | Contains command line parameters to pass to the extension. Only supported for desktop apps that have package identity. | An optional string between 1 and 32767 characters in length with a non-whitespace character at its beginning and end. | No | |
| uap11:Id | An identifier for the extension. The ID must be unique for all extensions in a package. | An optional string between 1 and 255 characters in length with a non-whitespace character at its beginning and end. | No | |
| uap11:Subsystem | This attribute is useful for non-UWP processes that need to be started with a specific subsystem. In most cases this should be left as the default. | An optional string that can have one of the following values: console, windows. | No | |
| uap11:SupportsMultipleInstances | Specifies whether the extension supports multiple instances. | An optional boolean value. | No | |
| uap11:ResourceGroup | A tag that you can use to group extension activations together for resource management purposes (for example, CPU and memory). | An optional alphanumeric string between 1 and 255 characters in length. Must begin with an alphabetic character. | No | |
| uap11:CurrentDirectoryPath | Specifies the initial directory when launching the process. | An optional string that cannot contain these characters: <, >, |, ?, or *. | No | |
| uap11:Parameters | Contains command line parameters to pass to the extension. | An optional string between 1 and 32767 characters in length with a non-whitespace character at its beginning and end. | No | |
| desktop7:CompatMode | Specifies the compatibility mode for the extension. | An optional string that can have one of the following values: classic, modern. | No | |
| desktop7:Scope | Specifies whether the extension is per-user or per-machine. | An optional string that can have one of the following values: machine, user. | No |
Child elements
| Child element | Description |
|---|---|
| uap4:SharedFonts | Contains the locations of custom fonts to be shared with other apps. For more information about this extension, see Share fonts with other Windows applications. |
| uap4:UserDataTaskDataProvider | Enables an app to become a DataProvider for a task. |
| uap4:MediaCodec | Defines an extension that enables an app to install media codecs from the Microsoft Store. |
| uap4:ContactPanel | Enables the contacts panel in a Windows app. |
| uap4:LoopbackAccessRules | Contains rules for a loopback filter that enables communication between an app and a service. |
| uap4:DevicePortalProvider | Defines a Device Portal provider for deployment. See Write a custom plugin for Device Portal for more details on implementation. |
Parent elements
| Parent element | Description |
|---|---|
| Extensions |
Requirements
| Item | Value |
|---|---|
| Namespace | http://schemas.microsoft.com/appx/manifest/uap/windows10/4 |
| desktop11 | http://schemas.microsoft.com/appx/manifest/desktop/windows10/11 |
| desktop7 | http://schemas.microsoft.com/appx/manifest/desktop/windows10/7 |
| uap10 | http://schemas.microsoft.com/appx/manifest/uap/windows10/10 |
| uap11 | http://schemas.microsoft.com/appx/manifest/uap/windows10/11 |
| Minimum OS Version | Windows 10 version 1703 (Build 15063) |
Remarks
windows.printWorkflowBackgroundTask and windows.printWorkflowForegroundTask are empty extension declarations that provide support for print scenarios. The background task entry point will initially be called by the print system to start handling print data, and the foreground task will be activated when requesting more information from the user. The background entry point must be a class implementing IBackgroundTask.
Examples
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