Re: CoCreateInstance inside a COM dll?

I changed the COM code like this,

STDMETHOD GetMyInterface(IMyInterface** pMyInterface, VARIANT_BOOL*
pResult)
{
-------------------------
HRESULT hr = QueryInterface(__uuidof(IMyInterface));
------------------------
}

And also the Client code like this,

GetInterface()
{
IMyInterface** pInterface;
HRESULT hr = m_pFirstInterface->GetMyInterface(&pInterface);
}

After this am still getting the Unhandled Exception ERROR.

Another thing is the interfaces are inherited here,

Like,

interface IFirstInterface : IUnknown{};

interface ISecondInterface : IFirstInterface {};

interface IMyInterface : ISecondInterface {};

interface ITopInterface : IUnknown {};

interface IClientInterface : IAllInterface {};

This is the inheritance structure of interfaces in COM IDL file.

I am trying to QueryInterface the IMyInterface from inside
IClientInterface.

Hope this helps in getting a better understanding of what am trying to
do.

So any guesses about the error am getting?