#1 Burning Software

Hi everybody,

could someone please explain me how to receive the notifications from the various processing in the StarBurn OCX SDK.
The skeleton below miss the proper implementation of the overidden callback class. I get errors relating to the the IDispatch and IUnknown implementation....

class MyStarBurnCallBack : public IStarBurnCallBack
{
public:
HRESULT __stdcall raw_ProgressCallBack (
/*[in]*/ long Percent,
/*[in]*/ long TimeRemaining )
{ // do something... }
};

TheBurnerThread
{
IDevicesPtr aDevicesPtr;
aDevicesPtr.CreateInstance("StarBurn.Devices");

IDevicePtr aDevicePtr = aDevicesPtr->GetDevice(XXX);
//!!
MyStarBurnCallBack myCallback;
aDevicePtr->PutCallback(&myCallback);
//!!
...
aDevicePtr->TrackAtOnceFromFileSystemHandle(aJolietImage->GetFileSystemHandle(),aTestWrite,VARIANT_FALSE);
...
aDevicePtr->CloseSession();
}

From compiler:
can't instantiate due to missing implementation of the IDispatch and the IUnknown-interface's
I know there exists default implementaitons such as IDispatchImpl<> and CComObject<>, but I don't see how to find all the
IID's and GUID's.

Thanks,
Gunnar

Hi!

So you are using Visual C++ and #import directive to generate smart pointers definitions? Then to generate IIDs and LIBID just add named_guids option to #import directive.

Regards,
Alexander Orlovsky

Thanks,

this made it. After some messing with ATL classes I made the callback start to arrive correctly.

For those interested, the stuff below might help someone:

#import "<pathto>//StarBurn.ocx" named_guids no_namespace
class MyStarBurnCallBack :
public IDispatchImpl< IStarBurnCallBack, &IID_IStarBurnCallBack, &LIBID_StarBurn>,
public CComObjectRoot,
public CComCoClass< MyStarBurnCallBack, &CLSID_CSimpleCallBack >
{
...
}

/Gunnar

Are there many people using OCX from Visual C++? Maybe it's time to make an ATL/MFC sample for OCX?

Regards,
Alexander Orlovsky