Trying to get an IConnectionPoint pointer

[Prattaratt]

I've been working with Borland C++ Builder 5.0 on a TAPI project. Right now I'm trying to figure out the event registration system. I've been able to get a valid (I think it's valid, anyway) IConnectionPointContainer pointer from my CoClass object, but when I use it to try and get an IConnectionPoint pointer, it fails with a E_POINTER error.
Question 1: Do I need to provide the IConnectionPointContainer->FindConnectionPoint function a pointer to an already initialized IConnectionPoint Object?
Question 2: If the answer to question 1 is yes, I'm not real clear on how to Init said pointer, so How to do so?

Here's the code Snippet:

void __fastcall RegTAPIEvents()
{
IConnectionPointContainer * pCPC;
IConnectionPoint * pCP;
IUnknown * pUnk;
HRESULT hr;
// Get the connection point container interface pointer from the TAPI object.
// This works
hr = Form1->MyTAPI1->QueryInterface(
IID_IConnectionPointContainer,
(void **)&pCPC
);
// Get the ITTAPIEventNotification interface pointer from the container.
// this fails with E_POINTER
hr = pCPC->FindConnectionPoint(
IID_ITTAPIEventNotification,
&pCP
);
pCPC->Release();
};

 

[cdraycott]

Prattaratt,

Doesnt look like anything is wrong with your code. I would make sure that the TAPI is correctly installed and initialised in the application using the Initialize() function.

 

[Prattaratt]

Just to bring evryone up to date, I managed to solve the problem. Here's my solution (I'm using BCB 5.0, BTW):

(void*)pCPC = malloc(100);
//not exactly sure on size of interface object, make it 100 bytes to be safe.
unsigned char *tmp = (byte *)pCPC;
for (int i =0;i<99;i++)
{
*tmp=0;
tmp++;
};
//zero out memory space
HRESULT hr;
// Get the connection point container interface pointer from the TAPI object. TAPI1 is of type TTAPI, imported from TAPI Type libray. Key to solution is in red
hr = TAPI1->GetDefaultInterface()->[/color red]QueryInterface(
IID_IConnectionPointContainer,
(void**)&pCPC);
// If ( hr != S_OK O) process the error here.

// Get the ITTAPIEventNotification interface
// pointer from the container.
hr = pCPC->FindConnectionPoint(
IID_ITTAPIEventNotification,
&pCP
);
// If ( hr != S_OK O) process the error here.

pCPC->Release();
free(pCPC);