GetInterface function
[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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
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