Int 20  P - Microsoft Windows - Nscl - Vxd Services                        [W]

   VxD = 0494h

Note:  the desired VxD and service number are identified by the data
     immediately following the INT 20 instruction, as in:
       INT 20h
       DW  service number
       DW  VxD identifier

See Also: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#0961,#1032

(Table 1020)
Values for NSCL (VxD ID 0494h) service number:
 00h   get NSCL version???
 01h   ???
 02h   ???

See Also: #1019,#1021