Abstract: Information describing a type registration regarding which an action is being requested by the client application is received as one or more parameters of an application programming interface method invoked by the client application. Based on the one or more parameters, one of multiple type extensions to which the action being requested corresponds is determined. At least part of the information describing the type registration is sent to the one of the multiple type extensions, and the one of the multiple type extensions performs the action being requested.

Abstract: A method and system for dynamically downloading custom code for execution within a host application is provided. A deployment system augments the manifest used for deploying managed applications to include information describing how the host application is to use the custom code, referred to as host manifest information. The deployment system reports the progress of the downloading of the manifest and the custom code to the host application. The host application can then perform appropriate host-specific processing. The host application may provide to the deployment system an interface for verifying the trust of the custom code. The deployment system also allows the host application to control the uninstalling of the custom code.

Abstract: Information describing a type registration regarding which an action is being requested by the client application is received as one or more parameters of an application programming interface method invoked by the client application. Based on the one or more parameters, one of multiple type extensions to which the action being requested corresponds is determined. At least part of the information describing the type registration is sent to the one of the multiple type extensions, and the one of the multiple type extensions performs the action being requested.

Abstract: Information describing a type registration regarding which an action is being requested by the client application is received as one or more parameters of an application programming interface method invoked by the client application. Based on the one or more parameters, one of multiple type extensions to which the action being requested corresponds is determined. At least part of the information describing the type registration is sent to the one of the multiple type extensions, and the one of the multiple type extensions performs the action being requested.

Abstract: Information describing a type registration regarding which an action is being requested by the client application is received as one or more parameters of an application programming interface method invoked by the client application. Based on the one or more parameters, one of multiple type extensions to which the action being requested corresponds is determined. At least part of the information describing the type registration is sent to the one of the multiple type extensions, and the one of the multiple type extensions performs the action being requested.

Abstract: A method and system for dynamically downloading custom code for execution within a host application is provided. A deployment system augments the manifest used for deploying managed applications to include information describing how the host application is to use the custom code, referred to as host manifest information. The deployment system reports the progress of the downloading of the manifest and the custom code to the host application. The host application can then perform appropriate host-specific processing. The host application may provide to the deployment system an interface for verifying the trust of the custom code. The deployment system also allows the host application to control the uninstalling of the custom code.

Abstract: A method and system for enforcing a security policy that is version-independent of a managed environment when loading custom code for a host application is provided. A security system of the managed environment receives an identifier of custom code to be loaded by the host application. Before loading the identified custom code, the managed environment enforces the security policy using the security system. The security system applies the security policy expressed using a version-independent indication of identifiers of untrusted custom code. If the security system determines that the trust of the custom code is unknown, then the security system requests a trust manager associated with the host application to enforce a host application-specific security policy. When the custom code is trusted, the managed environment loads the custom code.