INSSBuffer::SetLength method (wmsbuffer.h)
[The feature associated with this page, Windows Media Format 11 SDK, is a legacy feature. It has been superseded by Source Reader and Sink Writer. Source Reader and Sink Writer have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use Source Reader and Sink Writer instead of Windows Media Format 11 SDK, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The SetLength method specifies the size of the used portion of the buffer. If you are storing a sample in the buffer, call INSSBuffer::GetBuffer to retrieve the address of the buffer. Then copy your data to that address and use this method to set the length of the used portion of the buffer.
Syntax
HRESULT SetLength(
[in] DWORD dwLength
);
Parameters
[in] dwLength
DWORD containing the size of the used portion, in bytes.
Return value
The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.
| Return code | Description |
|---|---|
|
The method succeeded. |
|
dwLength is greater than the buffer size. |
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only],Windows Media Format 7 SDK, or later versions of the SDK |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | wmsbuffer.h (include Wmsdk.h) |
| Library | Wmvcore.lib; WMStubDRM.lib (if you use DRM) |