| Class | Description | |
|---|---|---|
![]()  | Constants | Defines constants used in the extensibility framework | 
![]()  | ExtensionTypes | String constants defining valid extension types. | 
![]()  | PlatformTypes | Constants defining Windows platform (architecture) types | 
![]()  | UserInterfacePlatformTypes | String constants for user interface platforms. | 
![]()  | UserInterfaceTypes | Indicates the type of user interface provided | 
            
