Defines an object that cannot be instantiated by itself.

  
[noncreatable]  
  

The noncreatable C++ attribute has the same functionality as the noncreatable MIDL attribute and is automatically passed through to the generated .IDL file by the compiler.

When this attribute is used within a project that uses ATL, the behavior of the attribute changes. In addition to the above behavior, the attribute also injects the OBJECT_ENTRY_NON_CREATEABLE_EX_AUTO macro. This macro indicates to ATL that the object cannot be created externally.

// cpp_attr_ref_noncreatable.cpp  
// compile with: /LD  
#include <unknwn.h>  
[module(name="MyLib")];  
  
[object, uuid("11111111-1111-1111-1111-111111111111")]  
__interface A   
{  
};  
  
[coclass, uuid("11111111-1111-1111-1111-111111111112"), noncreatable]  
class CMyClass : public A   
{  
   HRESULT xx();  
};  

For more information about the attribute contexts, see Attribute Contexts.

IDL Attributes
Class Attributes