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Compiler Error C3709

  • Artikkeli

'function': improper syntax for specifying event in __hook/__unhook

When you specify an event source with __hook or __unhook, the first parameter must be a valid event method and the second parameter must be a valid event source object (not a method).

The following sample generates C3709:

// C3709.cpp
// compile with: /LD
[event_source(native)]
class CEventSrc
{
public:
   __event void event1();
};

[event_receiver(native)]
class CEventRec
{
public:
   void handler1()
   {
   }

   void HookEvents(CEventSrc* pSrc)
   {
      __hook(bad, pSrc, CEventRec::handler1);   // C3709
      // Try the following line instead:
      // __hook(&CEventSrc::event1, pSrc, CEventRec::handler1);
   }

   void UnhookEvents(CEventSrc* pSrc)
   {
      __unhook(&CEventSrc::event1, pSrc, CEventRec::handler1);
   }
};