uap:AppService (Windows 10)

Article
10/30/2023

Declares an app extensibility point of type windows.appService. Application Contracts are a way for an app to invoke a background task belonging to another app; or for a background task invoked to service an app contract a way to communicate with its caller.

Element hierarchy

<uap:Extension>

<uap:AppService>

Syntax

<uap:AppService
  Name = 'A string with a value between 2 and 39 characters in length that consists of alphanumeric characters, periods (except for the first character), and dashes only.'
  ServerName = 'An optional alphanumeric string with a value between 1 and 255 characters in length. Must begin with an alphabetic character.'
  uap4:SupportsMultipleInstances = 'A boolean value'. />

Key

? optional (zero or one)

Attributes and elements

Attributes

Attribute	Description	Data type	Required
Name	The service name (used to match the caller of the Application Contract with the provider).	A string with a value between 2 and 39 characters in length that consists of alphanumeric characters, periods (except for the first character), and dashes only.	Yes
ServerName	The COM server to be instantiated to satisfy the contract activation (ensures that only one instance of the server exists at runtime). This is an optional attribute that is only used for PPLE host processes.	An optional alphanumeric string with a value between 1 and 255 characters in length. Must begin with an alphabetic character.	No
uap4:SupportsMultipleInstances	Supports multiple, separate instances of an app service.	A boolean value.	No

Child elements

None.

Parent elements

Parent element	Description
uap:Extension	Declares an extensibility point for the app.

Requirements

Item	Value
Namespace	`http://schemas.microsoft.com/appx/manifest/uap/windows10`
Minimum OS Version	Windows 10 version 1511 (Build 10586)

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