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GetInterface function

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[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The GetInterface function retrieves an interface pointer.

Syntax

HRESULT GetInterface(
   LPUNKNOWN pUnk,
   void      **ppv
);

Parameters

pUnk

Pointer to the IUnknown interface.

ppv

Address of a pointer to the retrieved interface.

Return value

Returns an HRESULT value.

Remarks

This member function performs a thread-safe increment of the reference count. To retrieve the interface and add a reference, call this function from your overriding implementation of the INonDelegatingUnknown::NonDelegatingQueryInterface method.

Requirements

Requirement Value
Header
Combase.h (include Streams.h)
Library
Strmbase.lib (retail builds);
Strmbasd.lib (debug builds)

See also

COM Helper Functions

INonDelegatingUnknown