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Asked: 2026-05-15T15:36:25+00:00

Is the above possible? Can I do this: IUnknown *punk; punk->QueryInterface(IID_MyInterface, (void**)&m_pMyInterface); I thought

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Is the above possible?

Can I do this:

IUnknown *punk;

punk->QueryInterface(IID_MyInterface, (void**)&m_pMyInterface);

I thought that this would tell me if the MyInterface is supported m_pMyInterface…

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1 Answer

  1. Editorial Team

    If you really mean what you’ve written above, then no: because your punk is an uninitialized pointer.

    Normally you need to call CoCreateInstance to create an instance of something; after that you can call QueryInterface on that instance, to ask what interface[s] it supports.

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