MFInvokeCallback function (mfapi.h)

Invokes a callback method to complete an asynchronous operation.

Syntax

HRESULT MFInvokeCallback(
  IMFAsyncResult *pAsyncResult
);

pAsyncResult

Pointer to the IMFAsyncResult interface. To create this object, call MFCreateAsyncResult.

The function returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Return code	Description
S_OK	The function succeeded.
MF_E_INVALID_WORKQUEUE	Invalid work queue. For more information, see IMFAsyncCallback::GetParameters.
MF_E_SHUTDOWN	The MFShutdown function was called to shut down the Media Foundation platform.

If you are implementing an asynchronous method, use this function to invoke the caller's IMFAsyncCallback::Invoke method.

The callback is invoked from a Media Foundation work queue. For more information, see Writing an Asynchronous Method.

The MFShutdown function shuts down the work queue threads, so the callback is not guaranteed to be invoked after MFShutdown is called.

Requirement	Value
Minimum supported client	Windows Vista [desktop apps \| UWP apps]
Minimum supported server	Windows Server 2008 [desktop apps \| UWP apps]
Target Platform	Windows
Header	mfapi.h
Library	Mfplat.lib
DLL	Mfplat.dll