IUnknown::QueryInterface method

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

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