ActiveX Control Event Problem

[Hantarex]

have created a control ocx with Visual Studio 2008.
In VB, Excel etc. it works,
but if the I use a C++, I don't succeed in correctly caring it.

This is the interface idl that I have created:

#include <olectl.h>
#include <idispids.h>

[ uuid(66C96E38-E40C-4F16-9371-A9D60601B7CB), version(1.0),
helpfile("OcxTest.hlp"),
helpstring("Modulo del controllo ActiveX OcxTest"),
control ]
library OcxTestLib
{
importlib(STDOLE_TLB);

typedef
[uuid(F39AA355-32F4-450b-B004-2AE3C1D09A24), version(1.0),
helpstring("Book Struct received by Event")]
struct BOOK{
[helpstring("Number of buying PDN")] LONG nPdnBuy;
[helpstring("Bid Quantity")] DOUBLE BidQty;
[helpstring("Bid Price")] DOUBLE Bid;
[helpstring("Ask Price")] DOUBLE Ask;
[helpstring("Ask Quantity")] DOUBLE AskQty;
[helpstring("Number of selling PDN")] LONG nPdnSell;
}BOOK;

// Interfaccia dispatch per COcxTestCtrl

[ uuid(785EBC41-D792-467D-B7BC-C97B7B8A6975),
helpstring("Interfaccia dispatch per OcxTest Control")]
dispinterface _DOcxTest
{
properties:
// [id(1), helpstring("Book Structure received by Event")] BOOK pBook;
methods:

[id(DISPID_ABOUTBOX)] void AboutBox();
[id(2), helpstring("metodo TestString")] void TestString(BSTR string);
};

// Interfaccia dispatch di eventi per COcxTestCtrl

[ uuid(4B3409A4-3336-45A1-B162-F72514FD320C),
helpstring("Interfaccia eventi per OcxTest Control") ]
dispinterface _DOcxTestEvents
{
properties:
methods:
[id(1)] void StringEvent(BSTR Stringg);
[id(2)] void TestBook(SAFEARRAY(BOOK) *pBook);
};

// Informazioni sulla classe per COcxTestCtrl

[ uuid(6A11A235-0187-4710-8503-DD7548F18A57),
helpstring("OcxTest Control"), control ]
coclass OcxTest
{
[default] dispinterface _DOcxTest;
[default, source] dispinterface _DOcxTestEvents;
};

};

Particularly I don't succeed to see the structure BOOK and of the two
events, I see only the first one (void StringEvent(BSTR StringTest);)
Can you help to understand me what I am wrong?

Naturally thanks!!