| Argument | Type | Description | 
| ppCPC | IConnectionPointContainer * | [out] A pointer to the caller's variable in which to return a pointer to the connectable object's IConnectionPointContainer interface. The connection point will call IConnectionPointContainer::AddRef before returning and the caller must call IConnectionPoint::Release when it is done using the pointer. | 
| Return Value | Meaning | 
| S_OK | Success. | 
| E_POINTER | The value in ppCPC is not valid (such as NULL) | 
| E_UNEXPECTED | An unknown error occurred. |