Re: Creating some classes derived from IDispatch

Hi.
I need to redefine default submit handler of each form on a HTML page.
But after executing some actions after sumbit event, I want to execute
the old handler. All is simple, if we have only one form, but if there
is some of them, there is a problem.
So, I want to create new classes derived from IDispatch and assign its
IDispatch* pointer as a new onsubmit handler. And it needs to save old
IDispatch* handler of every in each class. Using ATL wizard, I have
added a new class(derived from IDispatch), and implemented its Invoke
method. But, when I try to instantiate the class with new operator, I
have an error: cannot instantiate abstract class.
I have read, that I need to do so:
HRESULT hr;
CComObject<CMySink> *pSink = NULL;
hr = CComObject<CMySink>::CreateInstance(&pSink);
pSink->Initialize(<whatever>); // if you need to initialize your sink
pSink->GetUnknown()->AddRef();
hr = AtlAdvise(pSource, pSink->GetUnknown(), IID_IMyEvents, &dwCookie);

// This will destroy the sink if theconnection failed
pSink->GetUnknown()->Release();

But I how can use smart pointers in my function (that is on stack) or
in my main class (it is a BHO) if it is needed to save all pointers to
newly created classes and after all destroy them - I do not know how
many classes there will be, because there might be hundreds of
forms..... Please, show me the code how can I do that... Thank you for
attention.