Video for Windows 1.1--Automatic Window Shift Problem

 Last reviewed: May 25, 1995
Article ID: Q118390
The information in this article applies to:
  • Microsoft Windows Software Development Kit (SDK) for Windows version 3.1
  • Microsoft Win32 SDK, version 4.0

When a video playback window is created using MCI, the Video for Windows (VfW) system software may shift the window a small distance vertically or horizontally from the original location.

The video software does this to align the window on even-byte boundaries in video memory for optimal playback speed. When the window is located on a byte boundary, the video software is not required to perform bit-intensive calculations during video playback, increasing the playback speed.

This behavior is particular to Video for Windows and cannot be controlled by the application being affected.

Additional reference words: 3.10 4.00 95
KBCategory: kbmm kbprg
KBSubcategory: MMVideo

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.

Last reviewed: May 25, 1995
© 1998 Microsoft Corporation. All rights reserved. Terms of Use.