Re: about casting

Hello again!

You seems to be very good at COM!
Many thanks again.

I hope you can help me with one small thing.

Here I have the InitRules2 method which is a method defined in the COM
interface ISyntaxObj.
As you can see I save a pointer to my COM interface IHandle_DS* in another
class named CAlterObj.
You can also see that the first method to be called within InitRules2 is
DBInitCommandTemplate.
If you now look at method DBInitCommandTemplate you can see that I use the
local Session and local DS in the previous code in several places
but in the new code I can't use the local Session because of the new
functionality.
I must in some way use the CSession object that is stored in the concrete
C++ class CHandle_DS but that
is not easy because of the COM interface IHandle_DS.

Below I have listed OpenDS. This OpenDS method is part of the IHande_DS COM
interface.
I call this OpenDS from C# asp.net and it works good.
The reason for storing this CDataSource and CSession is to keep the database
open until I close it at the end of C# asp.net
I have also just confirm by testing that I can call OpenDS on the handle_ds
interface pointer from InitRules2 which I mentioned to you was a problem
before but not any longer.

So can you give me some advice how to modify or create a new interface so I
can access the object Session
in method DBInitCommandTemplate see below.

STDMETHODIMP CSyntaxObj::InitRules2(IHandle_DS* handle_ds, BSTR Provider,
BSTR DataSource, BSTR UserId, BSTR Password, BSTR ProductID, BSTR Revision,
            BSTR ApplicationID, BSTR ApplicationRev, BSTR SubfileID,
VARIANT_BOOL *bRes)
{
   m_pAltObj = new CAlterObj;
   m_pAltObj->m_handle_DS = handle_ds;
   m_pAltObj->DBInitCommandTemplate(some parameter here)))

}

HRESULT CAlterObj::DBInitCommandTemplate(some parameter here)
{
....
   //CSession Session; // old code
   //CDataSource DS; // old code
   //hr = DS:Open(); // old code
    //hr = Session.Open(DS); // old code
   hr = sqlRole.Open(Session);
   hr = LoadProcedureRules(&Session,&dbPropSet,ProductID, Revision,
SubfileID);
....
}

In header file(h file) for class CAlterObjI have the following
IHandle_DS* m_handle_DS;

STDMETHODIMP Handle_DS::OpenDS(VARIANT_BOOL *bRes)
{
    HRESULT hr S_OK;
    hr = DS.Open("OraOLEDB.Oracle","IDTHU1","CCR_DTH_USER","P55534552");
    hr = Session.Open(DS);
    return hr;
}

//Tony

"Giovanni Dicanio" <giovanniDOTdicanio@REMOVEMEgmail.com> wrote in message
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