COM Containment

[Tim Wallace]

I have a work assignment wherein I have to create a COM object to contain another COM object. The inner object was not aggregatable or poolable on Win2K server, so we needed to wrap it. I'm to the point where I need to pass the function calls to the contained object. My problem is that I can't get an interface pointer to the inner objects custom interface. How would I go about this? I tried creating an IID using the value the inner object registered in the registry, but I keep getting compiler errors when I try that. How can I create a variable of the type of the inner object's custom interface since I don't have any source/headers for this object (I do have the IDL and the DLL, of course, but that's it). Time is of the essence here! I'm stuck! Thanks in advance.

[Bill Wilson]

import the .dll and use the CreateInstance method. Say the interface is named X.A

#import X.dll no_namespace
IAPtr ppA;

try {

	CoInitialize(NULL);

	ppA.CreateInstance(\_\_uuidof(A));

            ppA->Somemethod();


	ppCrypt->Release();

	CoUninitialize();

Thanks for the help, Bill

[Bill Wilson]

The line ppCrypt->Release(); should read ppA->Release(); Thanks for the help, Bill