IMFMediaEventQueue::BeginGetEvent Method
Begins an asynchronous request for the next event in the queue.
Call this method inside your implementation of IMFMediaEventGenerator::BeginGetEvent. Pass the parameters from that method directly to this method.
Syntax
HRESULT BeginGetEvent(
[in] IMFAsyncCallback *pCallback,
[in] IUnknown *punkState
);
Parameter
pCallback [in]
Pointer to the IMFAsyncCallback interface of a callback object.punkState [in]
Pointer to the IUnknown interface of a state object, defined by the caller. This parameter can be NULL. The object is returned to the caller when the callback is invoked.
Rückgabewert
The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.
| Rückgabecode | Beschreibung |
|---|---|
| S_OK | The method succeeded. |
| MF_E_SHUTDOWN | The Shutdown method was called. |
Hinweise
This interface is available on the following platforms if the Windows Media Format 11 SDK redistributable components are installed:
- Windows XP mit Service Pack 2 (SP2) und höher.
- Windows XP Media Center Edition 2005 with KB900325 (Windows XP Media Center Edition 2005) and KB925766 (Oktober 2006 Updaterollup für Windows XP Media Center Edition) installed.
Anforderungen
Mindestens unterstützter Client |
Windows Vista |
Mindestens unterstützter Server |
Windows Server 2008 |
Header |
Mfobjects.h (include Mfidl.h) |
Bibliothek |
Mfuuid.lib |