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The following attributes apply to the class C++ keyword.
| Attribute | Description |
|---|---|
| aggregatable | Indicates that the class supports aggregation. |
| aggregates | Indicates that a control aggregates the target class. |
| appobject | Identifies the coclass as an application object, which is associated with a full .exe application, and indicates that the functions and properties of the coclass are globally available in this type library. |
| case | Used with the switch_type attribute in a union. |
| coclass | Creates an ActiveX control. |
| com_interface_entry | Adds an interface entry to a COM map. |
| control | Specifies that the user-defined type is a control. |
| custom | Lets you define your own attribute. |
| db_command | Creates an OLE DB command. |
| db_param | Associates the specified member variable with an input or output parameter and delimits the variable. |
| db_source | Creates a connection to a data source. |
| db_table | Opens an OLE DB table. |
| default | Indicates that the custom or dispinterface defined within a coclass represents the default programmability interface. |
| defaultvtable | Defines an interface as the default vtable interface for a control. |
| event_receiver | Creates an event receiver. |
| event_source | Creates an event source. |
| helpcontext | Specifies a context ID that lets the user view information about this element in the Help file. |
| helpfile | Sets the name of the Help file for a type library. |
| helpstringcontext | Specifies the ID of a help topic in an .hlp or .chm file. |
| helpstring | Specifies a character string that is used to describe the element to which it applies. |
| hidden | Indicates that the item exists but should not be displayed in a user-oriented browser. |
| implements | Specifies dispatch interfaces that are forced to be members of the IDL coclass. |
| implements_category | Specifies implemented component categories for the class. |
| module | Defines the library block in the .idl file. |
| noncreatable | Defines an object that cannot be instantiated by itself. |
| progid | Defines the ProgID for a control. |
| registration_script | Executes the specified registration script. |
| requestedit | Indicates that the property supports the OnRequestEdit notification. |
| source | Specifies the control's source interfaces for connection points on a class. On a property or method, the source attribute indicates that the member returns an object or VARIANT that is a source of events. |
| support_error_info | Supports error reporting for the target object. |
| threading | Specifies the threading model for a control. |
| uuid | Specifies the unique ID for a class or interface. |
| version | Identifies a particular version among multiple versions of a class. |
| vi_progid | Specifies a version-independent form of the ProgID. |