System.IInterface
Delphi
IInterface = interface
C++
__interface INTERFACE_UUID("00000000-0000-0000-C000-000000000046") IInterface : public IUnknown
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
interface class |
public | System.pas sysmac.h |
System | System |
Description
IInterface is the base class for all interfaces defined in Delphi code.
IInterface is the base interface for interfaces defined in Delphi code. When used in C++ code, IInterface is considered a child interface of IUnknown and IUnknown is considered the base interface for all interfaces.
Note: IInterface introduces the QueryInterface method, which is useful for discovering and using other interfaces implemented by the same object. IInterface also introduces the reference counting methods, _AddRef and _Release. The Delphi compiler automatically provides calls to these methods when interfaces are used. The TInterfacedObject class is provided as a base class for objects that implement interfaces. Use of TInterfacedObject is not mandatory, but will often be easier than designing an implementer class from scratch.
Note: C++ method declarations that use IInterface refer to the _di_IInterface type instead. This is a DelphiInterface wrapper around the IInterface interface:
typedef System::DelphiInterface< IInterface > _di_IInterface;