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System.IInterface

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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;

See Also

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