Video input/output (VIO) applications are partially supported. Some will work and some will not, depending on the API functions that the applications use. The robustness and security of Windows NT restrict access to physical hardware, which restricts the use of VIO physical buffer APIs, certain DosDevIOCtl functions, and I/O privilege level (IOPL). For more information, see the following section on APIs.
Note
Presentation Manager and AVIO applications are supported by the Windows NT Add-on Subsystem for Presentation Manager, available from Microsoft.