A proxy class provides access to a custom image globe overlay implemented by a plugin. Proxies are instantiated using Custom Image Globe Overlay Plugin Activator.
  CustomImageGlobeOverlay | Returns a custom image globe overlay. | 
  IsCustomImageGlobeOverlaySupported | Returns true if custom image globe overlays are supported. | 
  RealPluginObject | Returns a pointer to plugin object's IUnknown interface. | 





