IUnknown::QueryInterface(Q**) method (unknwn.h)

A helper function template that infers an interface identifier, and calls QueryInterface(REFIID,void).

Syntax

template<class Q>
HRESULT
STDMETHODCALLTYPE
QueryInterface(_COM_Outptr_ Q** pp)
{
    return QueryInterface(__uuidof(Q), (void **)pp);
}

The class Q template parameter is the type of a COM interface.

Parameters

[out] pp

Type: void**

The address of a pointer to an interface. For details, see the ppvObject parameter of QueryInterface(REFIID,void).

Return value

The function passes the return value back from QueryInterface(REFIID,void).

Requirements

Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	unknwn.h

See also

• IUnknown interface