IDirectDrawMediaSample::LockMediaSamplePointer method (amstream.h)
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The LockMediaSamplePointer method locks the surface that the sample represents.
Syntax
HRESULT LockMediaSamplePointer();
Return value
Returns an HRESULT value.
Remarks
Call this method only after calling IDirectDrawMediaSample::GetSurfaceAndReleaseLock.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | amstream.h |
| Library | Strmiids.lib |