Extender Provider doesn't support either the IExtenderProvider or the IExtenderProviderUnk interfaces.

The Extender Provider in use does not support the interface you have implemented.

To correct this error

• Implement IExtenderProvider if the Extendee Object supports the IDispatch automation interface.

  —or—

  Implement IExtenderProviderUnk if the Extendee Object is based on IUnknown.

See Also

Reference

IExtenderProviderUnk

IExtenderProvider

ObjectExtenders