Me again smile I finally made CoCreateInstance to succeed.

Well, my generated header file (I use the #import directive for .tlb type library files) contains named, pre-initialized GUIDs like these:

Code:
extern "C" const GUID __declspec(selectany) IID_iInterface =
    {0xf9f48469,0x68ab,0x3013,{0xb8,0x06,0xdd,0xa2,0x09,0x63,0xda,0xfb}};
extern "C" const GUID __declspec(selectany) CLSID_ComPlusClass =
    {0x2f307f57,0xb30a,0x3bdf,{0x83,0x15,0x95,0x26,0x6f,0x00,0x61,0x48}};

So I tried to use them in Lite-C, too, but

Code:
GUID IID_iInterface =
    {0xf9f48469,0x68ab,0x3013,{0xb8,0x06,0xdd,0xa2,0x09,0x63,0xda,0xfb}};

just throws a syntax error during compilation. Is there a way to overcome this?

Anyway, the file also contained uuid's like these lines:

Code:
struct __declspec(uuid("f9f48469-68ab-3013-b806-dda20963dafb"))
/* dual interface */ iInterface;

and I used them like this:

Code:
GUID CLSID_ComPlusClass;
IIDFromStr("{2f307f57-b30a-3bdf-8315-95266f006148}", &CLSID_ComPlusClass);
	
IID IID_iInterface;
IIDFromStr("{f9f48469-68ab-3013-b806-dda20963dafb}", &IID_iInterface);


and my structs are looking like that:

Code:
typedef struct _iInterfaceVtbl
{
	// COM object standard methods
	HRESULT __stdcall QueryInterface (void* This, IID *riid, void** ppvObject);
	DWORD __stdcall AddRef (void* This);
	DWORD __stdcall Release (void* This);

} iInterfaceVtbl;

typedef interface iInterface {iInterfaceVtbl* lpVtbl;} iInterface;


and CoCreateInstance --succeeds--! Yeah smile

Being happy, I wanted to test out, if the method calls to the classe are working. My header file tells me the following:

Code:
struct __declspec(uuid("f9f48469-68ab-3013-b806-dda20963dafb"))
iInterface : IDispatch
{
    //
    // Wrapper methods for error-handling
    //

    long SetHeartCoherence (
        long the_heart_coherence );
    long GetHeartCoherence ( );
    long SetInterbeatIntervalCircleData (
        BSTR data );
    BSTR GetInterbeatIntervalCircleData ( );
    long SetAmplitudeHartritmeVariatie (
        double data );
    double GetAmplitudeHartritmeVariatie ( );
    long SetInterbeatInterval (
        long data );
    long GetInterbeatInterval ( );
    long SetAverageHeartbeat (
        long data );
    long GetAverageHeartbeat ( );
    long SetAdemhalingsFrequentie (
        double data );
    double GetAdemhalingsFrequentie ( );
    long SetFFTArray (
        BSTR data );
    BSTR GetFFTArray ( );

    //
    // Raw methods provided by interface
    //

      virtual HRESULT __stdcall raw_SetHeartCoherence (
        /*[in]*/ long the_heart_coherence,
        /*[out,retval]*/ long * pRetVal ) = 0;
      virtual HRESULT __stdcall raw_GetHeartCoherence (
        /*[out,retval]*/ long * pRetVal ) = 0;
      virtual HRESULT __stdcall raw_SetInterbeatIntervalCircleData (
        /*[in]*/ BSTR data,
        /*[out,retval]*/ long * pRetVal ) = 0;
      virtual HRESULT __stdcall raw_GetInterbeatIntervalCircleData (
        /*[out,retval]*/ BSTR * pRetVal ) = 0;
      virtual HRESULT __stdcall raw_SetAmplitudeHartritmeVariatie (
        /*[in]*/ double data,
        /*[out,retval]*/ long * pRetVal ) = 0;
      virtual HRESULT __stdcall raw_GetAmplitudeHartritmeVariatie (
        /*[out,retval]*/ double * pRetVal ) = 0;
      virtual HRESULT __stdcall raw_SetInterbeatInterval (
        /*[in]*/ long data,
        /*[out,retval]*/ long * pRetVal ) = 0;
      virtual HRESULT __stdcall raw_GetInterbeatInterval (
        /*[out,retval]*/ long * pRetVal ) = 0;
      virtual HRESULT __stdcall raw_SetAverageHeartbeat (
        /*[in]*/ long data,
        /*[out,retval]*/ long * pRetVal ) = 0;
      virtual HRESULT __stdcall raw_GetAverageHeartbeat (
        /*[out,retval]*/ long * pRetVal ) = 0;
      virtual HRESULT __stdcall raw_SetAdemhalingsFrequentie (
        /*[in]*/ double data,
        /*[out,retval]*/ long * pRetVal ) = 0;
      virtual HRESULT __stdcall raw_GetAdemhalingsFrequentie (
        /*[out,retval]*/ double * pRetVal ) = 0;
      virtual HRESULT __stdcall raw_SetFFTArray (
        /*[in]*/ BSTR data,
        /*[out,retval]*/ long * pRetVal ) = 0;
      virtual HRESULT __stdcall raw_GetFFTArray (
        /*[out,retval]*/ BSTR * pRetVal ) = 0;
};


and I wanted to call the method, which is working in my C++ console application, which is looking like this::

Code:
if (hr == S_OK)
	{
		int m_hr = pComInterface->GetHeartCoherence();
		sprintf (stringbuffer, "%d ", m_hr);
		printf ("HeartCoherence result: [%s]", stringbuffer);
	}

So I took it simple and added the "getHeartCoherence" method to the Lite-C _iInterfaceVtbl struct as follows:

Code:
typedef struct _iInterfaceVtbl
{
	// COM object standard methods
	HRESULT __stdcall QueryInterface (void* This, IID *riid, void** ppvObject);
	DWORD __stdcall AddRef (void* This);
	DWORD __stdcall Release (void* This);
	
	// specific methods
	long __stdcall GetHeartCoherence (void* This);
	
} iInterfaceVtbl;

Now, if CoCreateInstance is OK, I just execute

Code:
long hc = pComInterface->GetHeartCoherence();
printf("HeartCoherence result: [%d]", (int)hc);


As soon as a I call the method, the engine simply -!!-crashes-!!-. Now I am not happy anymore wink

So, here are my summarized questions:

1) How do I use the above listed preinitialized GUIDs?
2) What have I forgotten?
3) What could be the reason for the crash?

Last edited by HeelX; 09/09/11 16:58.