CBaseDispatch.GetTypeInfo method

Artikkel
07/27/2023

[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 GetTypeInfo method retrieves the type information for the object, which can then be used to get the type information for an interface.

Syntax

HRESULT GetTypeInfo(
   REFIID    riid,
   UINT      itinfo,
   LCID      lcid,
   ITypeInfo **pptinfo
);

Parameters

riid: Reference to an interface identifier (IID) that specifies the interface.
itinfo: Type information to return. Must be zero.
lcid: Locale identifier.
pptinfo: Address of a variable that receives an ITypeInfo pointer.

Return value

Returns an HRESULT value. Possible values include the following.

Return code	Description
S_OK	Success.
E_POINTER	NULL pointer argument.
TYPE_E_ELEMENTNOTFOUND	The itinfo parameter is not zero.

Remarks

This method behaves like the IDispatch::GetTypeInfo method. However, it includes an additional parameter, riid, which specifies the interface for which to retrieve type information.

Requirements

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

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