MFCreateAsyncResult Function
Creates an asynchronous result object. Use this function if you are implementing an asynchronous method.
Syntax
HRESULT MFCreateAsyncResult(
IUnknown *punkObject,
IMFAsyncCallback *pCallback,
IUnknown *punkState,
IMFAsyncResult **ppAsyncResult
);
Parameter
punkObject
Pointer to the object stored in the asynchronous result. This pointer is returned by the IMFAsyncResult::GetObject method. This parameter can be NULL.pCallback
Pointer to the IMFAsyncCallback interface. This interface is implemented by the caller of the asynchronous method.punkState
Pointer to the IUnknown interface of a state object. This value is provided by the caller of the asynchronous method. This parameter can be NULL.ppAsyncResult
Receives a pointer to the IMFAsyncResult interface. The caller must release the interface.
Rückgabewert
The function returns an HRESULT. Possible values include, but are not limited to, those in the following table.
| Rückgabecode | Beschreibung |
|---|---|
| S_OK | The function succeeded. |
Hinweise
To invoke the callback specified in pCallback, call the MFInvokeCallback function.
Anforderungen
Mindestens unterstützter Client |
Windows Vista |
Mindestens unterstützter Server |
Windows Server 2008 |
Header |
Mfapi.h |
Bibliothek |
Mfplat.lib |
DLL |
Mfplat.dll |