__event 
   method-declarator
   ;
__event __interface interface-specifier;
__event member-declarator;

// Examples of native C++ events:
__event void OnDblClick();
__event HRESULT OnClick(int* b, char* s);

// Example of a COM event:
__event __interface IEvent1;

// Examples of managed events:
__event ClickEventHandler* OnClick; // data member as event
__event void OnClick(String* s); // method as event

// EventHandling_Native_Event.cpp
// compile with: /c
[event_source(native)]
class CSource {
public:
  __event void MyEvent(int nValue);
};

// EventHandling_COM_Event.cpp
// compile with: /c
#define _ATL_ATTRIBUTES 1
#include <atlbase.h>
#include <atlcom.h>

[ module(dll, name="EventSource", uuid="6E46B59E-89C3-4c15-A6D8-B8A1CEC98830") ];

[ dual, uuid("00000000-0000-0000-0000-000000000002") ]
__interface IEventSource {
  [id(1)] HRESULT MyEvent();
};
 [ coclass, uuid("00000000-0000-0000-0000-000000000003"), event_source(com) ]
class CSource : public IEventSource {
public:
  __event __interface IEventSource;
  HRESULT FireEvent() {
   __raise MyEvent();
   return S_OK;
  }
};

// EventHandling_Managed_Event.cpp
// compile with: /clr:oldSyntax /c
using namespace System;
[event_source(managed)]
public __gc class CPSource {

public:
  __event void MyEvent(Int16 nValue);
};

// EventHandling_Managed_Event_2.cpp
// compile with: /clr:oldSyntax /c
using namespace System;
[attribute(All, AllowMultiple=true)]
public __gc class Attr {};

public __delegate void D();

public __gc class X {
public:
  [method:Attr] __event D* E;
  [returnvalue:Attr] __event void noE();
};

__raise method-declarator;

 // EventHandlingRef_raise.cpp
struct E {
  __event void func1();
  void func1(int) {}

  void func2() {}

  void b() {
   __raise func1();
   __raise func1(1); // C3745: 'int Event::bar(int)': 
             // only an event can be 'raised'
   __raise func2();  // C3745
  }
};

int main() {
  E e;
  __raise e.func1();
  __raise e.func1(1); // C3745
  __raise e.func2();  // C3745
}