Multimedia Viewer Book
Multimedia Viewer Book (MVB) is a file format associated with Microsoft Multimedia Viewer. Multimedia Viewer is multimedia authoring (not just viewing?!) software for Windows that was included with Multimedia Development Kit (MDK).
MVB format is based on WinHelp HLP format.
[TODO: More research is needed to understand the nature of this format.]
- helpdeco → helpfile.txt - Mentions some features of HLP format that tend to be MVB-specific.
- An MSDN CD with a couple of MVB files, and probably other info