IMFByteStream::SetCurrentPosition method

Sets the current read or write position.


HRESULT SetCurrentPosition(
  QWORD qwPosition



New position in the stream, as a byte offset from the start of the stream.

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.
Invalid argument.


If the new position is larger than the length of the stream, the method returns E_INVALIDARG.

Implementation notes:This method should update the current position in the stream by setting the current position to the value passed in to the qwPosition parameter. Other methods that can update the current position are Read, BeginRead, Write, BeginWrite, and Seek.

This interface is available on the following platforms if the Windows Media Format 11 SDK redistributable components are installed:

  • Windows XP with Service Pack 2 (SP2) and later.
  • Windows XP Media Center Edition 2005 with KB900325 (Windows XP Media Center Edition 2005) and KB925766 (October 2006 Update Rollup for Windows XP Media Center Edition) installed.


Minimum supported client Windows Vista [desktop apps | UWP apps]
Minimum supported server Windows Server 2008 [desktop apps | UWP apps]
Target Platform Windows
Header mfobjects.h (include Mfidl.h)
Library Mfuuid.lib

See Also