 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 This content is outdated and is no longer being maintained.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. |
Retrieves a pointer to a specified interface on a component to which a client currently holds an interface pointer.
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 Values
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.