Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Compiler Error C3743
Collapse the table of content
Expand the table of content

Compiler Error C3743

can only hook/unhook an entire interface when the 'layout_dependent' parameter of event_receiver is true

The __unhook function varies in the number of parameters that it takes based on the value passed to the layout_dependent parameter in the event_receiver class.

The following sample generates C3743:

// C3743.cpp
#include <atlbase.h>
#include <atlcom.h>
[object] __interface I { HRESULT f(); };

[event_receiver(com, layout_dependent=true), coclass]
struct R : I {
        HRESULT f() {
      return 0;
        R() {

   R(I* a) {
      __hook(I, a, &R::f);   // C3743
      // The following line resolves the error.
      // __hook(I, a);

Community Additions

© 2015 Microsoft