CRendererInputPin.QueryId method

[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 QueryId method retrieves the pin identifier. This method overrides the CBasePin::QueryId method.

Syntax

HRESULT QueryId(
   LPWSTR *Id
);

Parameters

Id

Receives a string containing the pin identifier.

Return value

Returns one of the HRESULT values shown in the following table.

Remarks

This method allocates the wide-character string "In" and assigns it to the Id parameter. The caller must free the allocated memory, using the CoTaskMemFree function.

Requirements

See also

CRendererInputPin Class