Important:
This is retired content. This content is outdated and is no longer being maintained. It is provided as a courtesy for individuals who are still using these technologies. This content may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist.
A version of this page is also available for
4/8/2010

Retrieves a pointer to a specified interface on a component to which a client currently holds an interface pointer.

Syntax 

HRESULT QueryInterface(
  REFIID 
iid,
  void** 
ppvObject 
);

Parameters

iid

Specifies the IID of the interface being requested.

ppvObject

Receives a pointer to an interface pointer to the object on return.

If the interface specified in iidis not supported by the object, ppvObjectis set to NULL.

Return Value

Returns S_OK if the interface is supported, S_FALSE if not.

Remarks

This member function implements the IUnknown::QueryInterfacemethod and passes out references to the IEnumMediaTypesinterface.

Override this class to return other interfaces on the object in the derived class.

Requirements

Windows Embedded CE Windows CE 2.12 and later
Windows Mobile Windows Mobile Version 5.0 and later
Note Microsoft DirectShow applications and DirectShow filters have different include file and Library requirements
For more information, see Setting Up the Build Environment,
Version 2.12 requires DXPAK 1.0 or later