E_UNEXPECTED Catastrophic failure when calling COM exe server with a parameter of IPictureDisp

Question

Hi
I have a c++ client application and c++ COM EXE Server.
COM Exe has FromPicture method like the below.
STDMETHODIMP CMyComServer::FromPicture(IPictureDisp* picture)
{
...
return S_OK;
}
When I call this method in c++ client application like the below,
The COM error "E_UNEXPECTED Catastrophic failure" is caught.
No issue with other COM methods with passing string or integer.
So it seems that IPictureDisp cannot be passed to COM EXE server.
(I believe the same COM method works fine if it's a COM dll server)
I will appreciate if you leave any comment/suggestion.

   try  
{  
	hr = m_pMyComServer->FromPicture(pIPict);  
	pIPict->Release();  
	pIPict = NULL;  
catch (_com_error comErr)  
{

Answer 1

You can use an IStream* interface pointer to pass your picture object from the COM client to the COM Server.
The IPictureDisp object also implements IPersistStream. That is what the COM client can use to save the picture to a stream. The COM Server can then use IPersistStream to load the picture object from the stream.

The site wouldn't accept a code post so I'm posting images instead.

COM Client -

COM Server -

Before sending stream from client to server -

After stream sent with display of image by server -

Answer 2

Awesome!!! RLWA32-6355
My resolution was to save image to a temporary file and then pass file path to COM server.
But your one are much better than this.
I appreciate that.