procedure DefineProperties(Filer: TFiler); override;
virtual void __fastcall DefineProperties(System::Classes::TFiler* Filer);
Provides methods to read and write the IsControl property to a stream such as a form file.
DefineProperties is called automatically by the streaming system that loads and saves VCL components. It allows persistent objects to read and write properties that are not published. Published properties are loaded and stored automatically.
Override DefineProperties to persist unpublished properties. Call the DefineBinaryProperty or DefineProperty method of the Filer parameter to assign methods that load or save property values.
Note: When overriding this method, call the parent class's DefineProperties method first.